Nasa

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• Earth at risk after cuts close comet-spotting program, scientists warn

  20 Oct 2014: Astronomers sound alarm after closure of the Australian early-warning program that spotted the Siding Spring comet

• Comet Siding Spring set to have rare near miss with Mars

  19 Oct 2014: Fly-past of comet, thought to be debris from the creation of the solar system 4.5bn years ago, poses risk to Nasa spacecraft

• Hawaiian mission to Mars will explore the furthest frontiers of sustainability

  Guardian Professional, 15 Oct 2014: Six people are entering a geodesic dome in Hawaii for eight months to simulate a mission to Mars and push the boundaries of sustainability

• From the archive, 15 October 1969: Globetrotting Apollo wives talk moonshop

  15 Oct 2014: Originally published in the Guardian on 15 October 1969: Astronauts’ wives Janet Armstrong, Joan Aldrin, and Pat Collins are perfectly able to take this public parade in their stride

• Satellite eye on Earth: September 2014 – in pictures

  14 Oct 2014: Smoking volcanoes of Iceland, dust storms of Sahara and parched basin of the Aral Sea are among the images captured by ESA and Nasa satellites last month

• Still looking up: former Nasa chief who now nurtures Virgin’s spaceflight hopes

  9 Oct 2014: George Whitesides expects to have his honeymoon in space, amid doubts about whether Virgin Galactic will ever take off

• UK astronaut could walk on Mars in future Nasa mission

  9 Oct 2014: Nasa chief says Britain would be ‘perfect partner’ for US mission due to tradition of aeronautical innovation

• Astronauts take 6.5-hour spacewalk for International Space Station repairs

  7 Oct 2014: It was first spacewalk for flight engineers Reid Wiseman with Nasa and Alexander Gerst with the European Space Agency

• Isolation and hallucinations: the mental health challenges faced by astronauts

  5 Oct 2014: Why the mental health of astronauts may be the biggest challenge of all when it comes to successful space missions, writes Vaughan Bell

• Rift valleys rewrite moon’s fiery history

  1 Oct 2014: The discovery of rift valleys for the first time on the moon challenges conventional wisdom about our neighbour’s evolution

• A spacewalk selfie, the Giant Squid Nebula and an origami solar array – in pictures

  29 Sep 2014: This month’s roundup of the best space-related imagery in the known universe includes a dramatic solar flare, a cosmonaut’s selfie and an improbable marriage between technology and the ancient Japanese art of paper-folding

• Female cosmonaut bats back questions about hair and parenting

  25 Sep 2014: Press ask Russia’s Yelena Serova how she will style her hair and how her daughter will cope while she is on space mission

• Astronaut Chris Hadfield uses China trip to promote space cooperation

  24 Sep 2014: Former space station chief echoes China wish for global collaboration urging agencies like Nasa to work together

• Nasa's Maven spacecraft could solve mystery of Mars's missing water

  22 Sep 2014: Mars was once awash with water. With the arrival of Nasa’s Maven mission at the red planet, we may finally be close to working out where it all went

• Nasa's Maven spacecraft enters Mars's orbit – video

  Video (59 sec), 22 Sep 2014:

  After blasting off from Earth 10 months ago, Nasa's Maven spacecraft enters Mars's orbit

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