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Science Series Space

…and we have touchdown!

This week I was going to write about Black Holes, however with history being made yesterday afternoon, how could I not write about the Rosetta mission?

Jonny gave some background to the Rosetta mission a few weeks ago, so now that Philae (the probe) has landed, it’s time for an update!

Philae Has Landed

At 16:05 GMT yesterday afternoon, Philae successfully landed on Comet 67P/Churyumov-Gerasimenko. It wasn’t a perfect landing, as when Philae first touched down, it is thought that the harpoons did not fire, and as such, it bounced off potentially up to a kilometer high, before landing again. The European Space Agency belive that it first landed at 15:33 and then it landed again at 17:26. It is thought that the second landing wasn’t a success either, but after another short bounce it is believed that at 17:33 Philae finally landed properly. With so little gravity, it is very fortunate that after one unsuccessful landing Philae didn’t sustain major damage, or wasn’t thrown off into space.

Whilst scientists aren’t sure if Philae is properly secured, they do know that it is functioning as it has already sent communication including pictures, back to Earth.

Delay

Sunlight takes 8 minutes and 19 seconds to reach Earth. The signal confirming that Philae had landed took 28 minutes from leaving Rosetta to reach Earth, showing just how far away it is. The comet Rosetta has been tracking takes 6 years to orbit the Sun and is currently around 450 million kilometers from the Sun. To put that into perspective, Earth is around 150 million kilometers from the Sun.

Singing

A sound clip from Rosetta has also been sent back to Earth. Want to know what life on a comet sounds like? Check out the clip below.

The sound is going viral, as millions of people on social media speculate as to what it is. It is the lonely sound of space, or could it be aliens crying out?

More?

If you are interested in finding out more about the landing itself, take a look at this handy BBC guide. You can also follow Philae and Rosetta on Twitter. For more information on anything Rosetta, head over to the European Space Agency’s dedicated site.

Naturally, keep a close watch on social media today, for more exciting developments.

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Competitions Science Series Space

The Rosetta Space Mission

rosetta

This week I am muscling in on Christopher’s space series with a guest post about comet exploration.

In a couple of weeks (on November 12th to be precise), scientists will try to put a lander on a comet for the first time ever. The mission blasted off 10 years ago, made its rendezvous and began orbiting in August of this year, and is currently being prepared to touch down.

The mission is called Rosetta, and it is operated by the European Space Agency. It is a risky mission though and there are no guarantees that the lander will be able to plant itself safely on the comet. But if all goes well, the lander will stay operational as the comet flies closer and closer to the sun in its elliptical orbit, so that it can study how proximity to the sun changes the elements that make up the comet. The orbiter will follow, and should stay with comet until the end of next year, while the lander will operate until the spring when it will then get too hot to function.

Comets are some of the oldest structures in the solar system, so learning what they are made of and how they undergo change is seen as the closest thing to going back to the formation of the system currently possible. Scientists hope to gather evidence about water and carbon content, to see if the Earth could have got its first water and elements that are needed for the development of life from such bodies.

The Europeans Space agency has an interactive graphic so you can see how Rosetta arrived at its destination, and it is well worth a look. You really get an idea of the task of getting to something that is just a few KM across and traveling at 55 000 Kilometres per hour.

This article in the online journal Science gives lots more information, and there are some great photos here.

The European Space Agency are also running a competition to name the area where the craft is due to touch down. They want the public to propose names and reasons to use them, so that someone has the chance to enter the history books as their name will be immortalized. Why not give it a go, read more here.