Philae silver lining: robot lab shielded from sun

2015-08-12 21:42
The deployment of the Philae lander to comet 67P/Churyumov–Gerasimenko from the Rosetta spacecraft. (ESA, AP)

The deployment of the Philae lander to comet 67P/Churyumov–Gerasimenko from the Rosetta spacecraft. (ESA, AP)

Multimedia   ·   User Galleries   ·   News in Pictures Send us your pictures  ·  Send us your stories

Paris - When a comet whizzes past the Sun on Thursday it won't mean certain high-temperature death for a European robot lab riding on the chunk of ice and dust.

Instead, the rough, off-target landing by the Philae lander - deposited on the comet's surface last November by the Rosetta spacecraft - has turned out to have a silver lining.

"It had some disadvantages. We had to reschedule everything, which had to happen really fast in the first days after landing," German Aerospace Center (DLR) spokesperson Manuela Braun told AFP.

"But you also have the advantage that it [Philae] has really survived much longer. On its original site it would have been too hot by March or April."

In other words, if the European Space Agency's robot lab had hit the mark on Comet 67P/Churyumov-Gerasimenko last year it would have been cooked into inaction by now.

But because it bounced and tumbled to a halt on a shadier stretch of the alien surface, it might be able to witness the dramatic show on the comet as it warms.

The lander can stand temperatures of up to 50°C, while the temperatures on 67P will hit roughly 80°C when it passes the Sun.

The comet, which is made of ice, minerals and organic particles, has gone into a burst of activity prompted the approaching Sun's heat. It is spewing hundreds of kilos of gas and a ton of dust per second.

The European Space Agency reported this week that one of the comet's outbursts was so dramatic that it pushed away the incoming power of the Sun.

Closest point

"This is the brightest jet we have seen so far," said Carsten Guettler, who works on the project, and is from the Max Planck Institute for Solar System Research. "Usually the jets are quite faint."

Scientists hope the heat of perihelion will cause the enigmatic traveller to shed more of its icy crust.

If so, it could disgorge pristine particles left from the solar system's birth 4.6 billion years ago, they believe.

The comet will reach its closest point to the Sun - some 186 million kilometres - at about 02:00 GMT on Thursday, before embarking on another six-and-a-half year egg-shaped orbit.

But one question is whether Philae will transmit any more information from its perch on the comet.

As 67P has drawn closer to the Sun, it recharged and woke up on June 13, only to fall silent again less than a month later.

Too far away

Scientists have sent "blind" commands to the lab in the hopes it will fire up and perform a few basic experiments during the comet's passage past the Sun.

"We have the advantage that it [Philae] is really now travelling alive on the comet. It could be working still for the next month," said Braun, from the German Aerospace Centre. "But we still have the problem of getting into contact."

Further complicating communication is the fact that Rosetta has had to move farther away to avoid the confounding effects of the dust storm on its star-tracking navigation system.

The spacecraft now orbits at more than 300km from the comet, compared to less than six kilometres from the surface at its closest in February.

If Philae decides to send a message on Thursday, Rosetta will be too far away to receive it.

"Our priority is the probe," Sylvain Lodiot, head of Rosetta operations at the European Space Operations Centre, told AFP.

Read more on:    rosetta  |  esa  |  space

Join the conversation!

24.com encourages commentary submitted via MyNews24. Contributions of 200 words or more will be considered for publication.

We reserve editorial discretion to decide what will be published.
Read our comments policy for guidelines on contributions.

24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.

Comment on this story
1 comment
Comments have been closed for this article.

Inside News24

 
/News

Book flights

Compare, Book, Fly

Traffic Alerts
There are new stories on the homepage. Click here to see them.
 
English
Afrikaans
isiZulu

Hello 

Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.


Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire 24.com network.

Settings

Location Settings

News24 allows you to edit the display of certain components based on a location. If you wish to personalise the page based on your preferences, please select a location for each component and click "Submit" in order for the changes to take affect.




Facebook Sign-In

Hi News addict,

Join the News24 Community to be involved in breaking the news.

Log in with Facebook to comment and personalise news, weather and listings.