A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_URI::$config is deprecated

Filename: core/URI.php

Line Number: 101

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Router::$uri is deprecated

Filename: core/Router.php

Line Number: 127

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$benchmark is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$hooks is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$config is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$log is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$utf8 is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$uri is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$exceptions is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$router is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$output is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$security is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$input is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$lang is deprecated

Filename: core/Controller.php

Line Number: 82

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$db is deprecated

Filename: core/Loader.php

Line Number: 396

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_DB_mysqli_driver::$failover is deprecated

Filename: database/DB_driver.php

Line Number: 371

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::open($save_path, $name) should either be compatible with SessionHandlerInterface::open(string $path, string $name): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 132

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 294

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 168

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 237

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 317

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 358

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 282

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 289

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 304

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 314

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 315

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 316

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 317

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 375

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_set_save_handler(): Session save handler cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 110

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Session cannot be started after headers have already been sent

Filename: Session/Session.php

Line Number: 143

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$session is deprecated

Filename: core/Loader.php

Line Number: 1283

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$datatables is deprecated

Filename: core/Loader.php

Line Number: 1283

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$form_validation is deprecated

Filename: core/Loader.php

Line Number: 1283

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 8
Function: __construct

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$identity is deprecated

Filename: core/Loader.php

Line Number: 358

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 9
Function: model

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$banner is deprecated

Filename: core/Loader.php

Line Number: 358

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 10
Function: model

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$posting is deprecated

Filename: core/Loader.php

Line Number: 358

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 11
Function: model

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Blog::$category is deprecated

Filename: core/Loader.php

Line Number: 358

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 12
Function: model

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$load is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$benchmark is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$hooks is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$config is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$log is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$utf8 is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$uri is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$exceptions is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$router is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$output is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$security is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$input is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$lang is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$db is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$session is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$datatables is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$form_validation is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$identity is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$banner is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$posting is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$category is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /home/tronxid/siwarga.tron-x.id/application/controllers/Blog.php
Line: 68
Function: view

File: /home/tronxid/siwarga.tron-x.id/index.php
Line: 315
Function: require_once

Europe plans sat-nav and telecoms network at the Moon - CI

Europe plans sat-nav and telecoms network at the Moon

Aug 05, 2025

The European Space Agency is proposing a precise navigation system at the Moon, much like the sat-nav technology we have here on Earth. It would enable spacecraft and astronauts to know exactly where they are when moving around the lunar body and to land with precision. The initiative, known as Moonlight, would also incorporate a telecommunications function. A large flotilla of lunar missions will be launched this decade. Chief among them will be the US space agency-led successor to Apollo. Called Project Artemis, this will put crews on the Moon for the first time in more than 50 years. "We are entering a new phase - the systematic exploration of our 'eighth continent', the Moon," said David Parker, the director of human and robotic exploration at Esa. "The Moon is a repository of 4.5 billion years of Solar System history, but we've hardly begun to unlock its secrets. And so Moonlight is something that we see as really exciting, as a necessary infrastructure to support sustained exploration." Esa is asking two industrial consortia in Europe to define what an integrated sat-nav and telecoms system at the Moon would look like. It'll include a constellation of at least three, but probably more, positioning-and-relay satellites to give global coverage, and will likely include some surface beacons, too, to augment the accuracy of the navigation signals. "The target we have at the moment is that the constellation would be able to allow for an accuracy of 100m and probably better. We think we are able to get to 30m in the first instance," explained Paul Verhoef, the director of Esa's navigation department. Moonlight is just at the feasibility stage at the moment - what is known in industry-speak as a Phase A/B1 study. The consortia will put their thinking on the technologies required in reports to Esa, who will then produce a defined and costed proposal to go before Europe's research ministers when they gather for their triennial council meeting next year. One consortium will be led by the UK small satellite manufacturer, Surrey Satellite Technology Limited. SSTL assembled the navigation payloads on the European Union's Galileo sat-nav system.