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NASA Image Of The Day

Milky Way Viewed From the International Space Station
NASA Image Of The Day
NASA astronaut Reid Wiseman captured this image from the International Space Station and posted itto social media on Sept. 28, 2014, writing, "The Milky Way steals the show from Sahara sands that make the Earth glow orange." Aboard the space station, the six-person Expedition 41 crew is currently preparing for two spacewalks set for Oct. 7 and 15. During the first six-and-a-half-hour spacewalk, slated to begin on Oct. 7 around 8:10 a.m. EDT, Wiseman and European Space Agency astronaut Alexander Gerst will transfer a previously uninstalled pump module from its temporary stowage location to the External Stowage Platform-2. The two spacewalkers also will install the Mobile Transporter Relay Assembly that adds the capability to provide ?keep-alive? power to the system that moves the station?s robotic arm between worksites. NASA astronaut Barry Wilmore will join Wiseman for the second Expedition 41 spacewalk on Oct. 15. Image Credit: NASA/Reid Wiseman...
01 Oct 2014
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ESA Navigation
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  • China to join effort developing post-2020 aircraft satnav standards

    Aircraft employ satellite navigation too: Europe’s EGNOS augmentation system sharpens the accuracy and reliability of GPS signals so they can safely be used for landing approaches across a growing number of European airports. But aviation is a global enterprise – so the aim is to develop a seamless network of augmentation systems in future.



  • Galileo satellites – status update

    The fifth and sixth Galileo satellites have been in a safe state since 28 August, fully under control from ESA’s centre in Darmstadt, Germany, despite having been released on 22 August into lower and elliptical orbits instead of the expected circular orbits.



  • Team of teams

    Human spaceflight & operations image of the week: The experts who brought the Galileo satellites under control

  • Update on Galileo launch injection anomaly

    Operations continue smoothly for Galileo Sat 5-6. Both satellites now have both sets of their solar arrays fully deployed and generating power.



  • Galileo status

    Updates on the Galileo Soyuz launch injection anomaly

  • Update on Galileo launch injection anomaly

    Work at ESA’s ESOC control centre continues relentlessly on the two Galileo satellites.



  • Soyuz Galileo launch: injection anomaly

    Following the announcement made by Arianespace on the anomalies of the orbit injection of the Galileo satellites, the teams of industries and agencies involved in the early operations of the satellites are investigating the potential implications on the mission.



  • Galileo liftoff

    Soyuz Flight VS09, carrying Europe's fifth and sixth Galileo satellites, lifted off from Europe's Spaceport in Kourou, French Guiana, on 22 August 2014 on 12:27:11 UTC/14:27:11 CEST.

  • New launch date for Galileo

    Arianespace has announced the next launch attempt for Soyuz VS09 with Europe's fifth and sixth Galileo satellites is 22 August at 12:27 GMT, 14:27 CEST.



  • ESA and CNES experts ready for Galileo’s first orbits

    Lift-off for Galileo satellites 5 and 6 is set for Thursday, 21 August, at 12:31 GMT (14:31 CEST) on a Soyuz rocket from the Guiana Space Centre, French Guiana.

    Just 9 minutes and 23 seconds later, the Fregat upper stage carrying the payload will separate from the Soyuz third stage, and conduct a pair of engine burns separated by an approximately three-hour ballistic coast phase.

    Three hours and 47 minutes after launch, the Galileo satellites will separate into free-flight orbit, 23 522 km above Earth. On board each satellite, an automatic sequence will be triggered, switching the spacecraft on, booting up the onboard software, deploying a pair of solar arrays and orienting the spacecraft toward the Sun.



  • Galileo satellites seated atop Soyuz launcher

    Europe’s latest two Galileo satellites have been placed on top of their Soyuz launcher, ready for their ride to orbit tomorrow.



  • Galileo satellites encapsulated for launch

    Europe’s latest Galileo satellites have been sealed within their launch fairing, atop the Fregat upper stage that will carry them into their final orbit.



  • Launching Galileo

    Follow preparations for the forthcoming launch of Europe's fifth and sixth Galileo satellites from our dedicated website

  • Deploying Galileo

    Friday 22 August sees the launch of the first of the rest of the Galileo constellation. A new video explains Galileo's next phase

  • Twin Galileos meet, ready for Thursday’s launch

    Final functional testing of Europe’s twin Galileo navigation satellites has been completed at Europe’s Spaceport in French Guiana, on track for launch this Thursday.



  • New video: Galileo towards the future

    The special significance of next Thursday's launch for the Galileo system as a whole is highlighted in a new ESA video, including an interview with Didier Faivre, the Agency's Director of the Galileo Programme and Navigation-related Activities.



  • Call for Media: Press briefing on launch of Galileo satellites 5-6

    The next satellites in Europe’s Galileo satellite navigation system will be launched on 21 August, ushering in the system deployment phase and paving the way for the start of initial services. Media are invited to take part in an audio briefing on Wednesday, 20 August.



  • Galileo’s ‘midwives’ stand ready for launch

    Galileo’s post-launch team at ESA have finalised their preparations for taking control of the twin satellites being launched next month.



  • Galileo: it’s all about the time

    Europe’s Galileo satellite navigation system – the combination of satellites in space and stations on the ground – forms a planetary scale timepiece. Current testing shows it keeping very good time indeed – around 10 billionths of a second on average. 



  • Galileo fixes worldwide

    ESA's offer to issue certificates for the very first 50 Galileo fixes provoked responses from across the whole world

  • Pioneer Galileo navigation fixes recognised by ESA

    Billions of satnav position fixes are performed daily, but determining your place in the world using Europe’s Galileo system is quite new. So ESA offered to issue certificates for the very first 50 Galileo fixes – provoking responses from across the whole world.



  • Apprentices sought for satnav summer school

    Students still have time to join the ESA International Summer School on GNSS, taking place in the Czech Republic this July. The 10-day course will cover all aspects of satellite navigation, up to and including the creation of a satnav-based business.



  • Sea trial

    Results are being processed from a long-range Galileo maritime trial spanning the North Sea

  • Wings of power

    Europe’s Galileo satellites in orbit are kept alive by the Sun – through their solar arrays

  • Galileo for mass market

    ESA is working directly with European manufacturers of mass-market satnav chips and receivers to ensure that their products are Galileo-ready

  • First airborne fix

    For the first time, Europe has been able to determine an aircraft's position using only Galileo

  • Search and rescue sites

    Dedicated ground stations at opposite ends of Europe enable Galileo participation in global Cospas–Sarsat search and rescue testing

  • Navipedia

    Visit Navipedia, the web’s leading resource on satellite navigation: http://www.navipedia.net

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