Philae Lander Awakening from Deep Sleep in the Cold Shadows of Comet 67P

Scientists from the European Space Agency (ESA) will attempt to make contact with the stricken Philae lander for the first time in nearly four months.

""The spacecraft successfully touched down on comet 67P/Churyumov-Gerasimenko in November last year, but an unexpectedly bouncy landing left it stranded in an area far colder and with far less sunlight than scientists had originally planned. The craft was able to carry out a number of experiments over the next three days, but eventually entered a low power state before it ran out of power. Now, as the comet draws closer to the Sun and receives more heat and light, scientists are hopeful it will awaken again in the coming weeks, to finish off the work it started.

"Philae currently receives about twice as much solar energy as it did in November last year," says the lander's project manager Stephan Ulamec. "It will probably still be too cold for the lander to wake up, but it is worth trying. The prospects will improve with each passing day."

For Philae to wake up completely, the interior of the craft must be at least -45ºC and its solar panels must be receiving a minimum of 5.5 watts of power. Once its core systems realize that these criteria have been met, the lander will attempt to charge its battery, switching on its receiver every 30 minutes to listen for instructions from the orbiting Rosetta. Scientists say it's possible that Philae has already woken up, but that the lander doesn't yet have enough power to communicate with Rosetta.

"At this time, we do not yet know that the lander is awake," says Koen Geurts of the Rosetta control center. "To send us an answer, Philae must also turn its transmitter – and that requires additional power.""

Between the 11th and 20th of March, Rosetta will make a number of flybys during Philae's daytime — that is, when the side of the comet its on is exposed to sunlight. A day on 67P currently lasts 12.4 hours and scientists believe that Philae is only exposed to the Sun for 1.3 hours every day — not even half of what was planned for. If initial communication is made in the next few weeks, scientists can begin checking on Philae's condition.

30 Minutes to Transmission:

http://www.theverge.com/2015/3/11/8189569/philae-lander-waking-first-attempt

Six-Man Team of Volunteer Astronauts 520 Days Later: Fake Mars Mission Ready to Return After Being Locked Inside a Fake Spaceship in a Moscow Car Park

About to Emerge Back on Planet Earth

""The year and a half of isolation, dubbed Mars500 and run by the European Space Agency (ESA), was designed to see how real space crews would cope with confinement, daily activities and psychological stress on a lengthy trip to the red planet and back.

The all-male crew could only shower once a week, ate canned food and received emails on a delay, depending on how “far away” they are from Earth. Their living quarters are the size of a bus and, outside of a quick stint on mock Mars, they’ve spent two eight-month periods in total confinement.

But Patrik Sundblad, the human life sciences specialist at the ESA, says the simulation has proved a complete success. “Yes, the crew can survive the inevitable isolation that is for a mission to Mars and back,” Sundblad stated. “Psychologically, we can do it.”

“They have had their ups and downs, but these were to be expected. In fact, we anticipated many more problems, but the crew has been doing surprisingly well,” Sundblad said. “August was the mental low point: it was the most monotonous phase of the mission, and their friends and families were on vacation and didn’t send so many messages.”""

http://www.wired.com/wiredscience/2011/11/mars-500-mission-end/