What a Day!

 ROLIS descent image of Comet 67P/C-G. Credits: ESA/Rosetta/Philae/ROLIS/DLR


ROLIS descent image of Comet 67P/C-G. Credits: ESA/Rosetta/Philae/ROLIS/DLR

As the Philae lander approached comet 67P/G-C it used the ROLIS instrument to take this image at 14:38:41 UT from just 3 km / 1.9 miles above the surface.

The ROLIS instrument looks downward during descent and gets close up views after landing so texture and microsturcture of surface materials.

Yes, that is part of the lander you see in the upper right.

ROLIS (ROsetta Lander Imaging System) is a descent and close-up camera on the Philae Lander. It has been developed by the DLR Institute of Planetary Research, Berlin.

I had to include the image below, I think it’s just excellent. We are looking at the Philae lander shortly after being released from the mother ship (Rosetta) after a 10 year trip together on this totally amazing mission.

Good luck Philae. Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA

Good luck Philae. Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA

No word yet on what is going on with the harpoons (anchors), but ESA did mention “Maybe today we didn’t just land once…we even landed twice!”

There will be plenty more images here, but check out the Rosetta Blog.

ESA Rosetta Mission on Twitter

Congratulations ESA !

I bet the smiles are abundant and they should be. :mrgreen:

Good Luck Philae!

GOOD LUCK!  I can hardly believe the day has finally come – it’s been a long time!

Update:  Landing confirmed.  Harpoons did not fire, investigation in progress.  The one way radio travel time is a bit over 28 minutes – each way.

ESA is reporting all is well with Philae is in good shape despite the harpoons.

If you see no video above it is because ESA isn’t broadcasting at the time.

Check out the Rosetta Blog and for last second updates.

@ESA_Rosetta   http://www.twitter.com/esa_rosetta

After The Landing

Philae timeline.  Click for a more readable version. Credit: ESA

Philae timeline. Click for a more readable version. Credit: ESA

The big day is almost here. What will happen once Philae lands on Comet 67P/Churyumov–Gerasimenko?

This from ESA:

A timeline of the science operations that Rosetta’s lander Philae will perform during the first 2.5 days on the surface of Comet 67P/Churyumov–Gerasimenko.

It does not include the experiments conducted during the seven-hour descent or immediately upon touchdown and in the 40 minutes after as the separation, descent and landing operations and experiments conclude (see this graphic for a summary of those activities).

Continue reading

Two Days Away

Rosetta's NAVCAM image just 31.8 km from the centre of Comet 67P/Churyumov-Gerasimenko on 4 November 2014 ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

Rosetta’s NAVCAM image just 31.8 km from the centre of Comet 67P/Churyumov-Gerasimenko on 4 November 2014 ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

An image  on 04 November shows some activity in the way of the jets emanating from the central region of comet 67P/Churyumov-Gerasimenko.

For the past couple of weeks I’ve developed quite an interest in what the cometary “soil” is like and how it got to be the way it is.  Happily we could get more clues just watching the Philae lander land on Wednesday. If the composition is very fine we could see quite a cloud kicked up relative to how much is at the landing site of course.

If you would like the four individual panels making up this image you can get them at Comet Watch

 

Making History

Just three days away.

This is Friday’s press conference with Rosetta mission experts hosted by Emily Baldwin, ESA space science editor / Rosetta Blog

The video is in distinct segments of about 15 minutes and questions at the end.

Introduction and mission plans fellowed by Science at 15 minutes, Landing at 30 minutes and Summary at 45 followed by questions.

Video link

About the Mars Comet

A teleconference discussing some of the science findings from the C/2013 A1 Siding Spring (aka: the Mars Comet) fly by of the planet Mars.

A bit technical here and there but very well explained and totally worth seeing.

BTW, it takes a few minutes to get going.

The participants were:

  • Jim Green, director, Planetary Science Division, NASA Headquarters, Washington
  • Nick Schneider, instrument lead for MAVEN’s Imaging Ultraviolet Spectrograph, University of Colorado, Boulder
  • Mehdi Benna, instrument scientist for MAVEN’s Neutral Gas and Ion Mass Spectrometer, NASA Goddard Space Flight Center, Greenbelt, Maryland
  • Don Gurnett, co-investigator on the Mars Advanced Radar for Subsurface and Ionosphere Sounding instrument on Mars Express, University of Iowa, Iowa City
  • Alan Delamere, co-investigator for MRO’s HiRISE instrument, Delamere Support Services, Boulder, Colorado

Video

Rosetta’s Comet

rosettacometnasa

Wow, what a great view of a comet you can get from just 30 km (18.6 miles).

Click the image above for a larger version and enjoy the detail.

Caption via NASA:

This image of comet 67P/Churyumov-Gerasimenko was obtained on October 30, 2014 by the OSIRIS scientific imaging system on the Rosetta spacecraft. The right half is obscured by darkness. The image was taken from a distance of approximately 18.6 miles (30 kilometers).
Image Credit: ESA/Rosetta/MPS for OSIRIS Team

Dione – A Global View

dionemap

NASA has produced global mosaics of Saturn’s moon Dione from Cassini spacecraft images. The image here is a trailing hemisphere which is darker than the leading hemisphere possibly because to “alteration by magnetospheric particles and radiation striking those surfaces”. It is also thought the leading hemisphere “is coated with icy dust from Saturn’s E-ring, formed from tiny particles ejected from Enceladus’ south pole. These satellites are all being painted by material erupted by neighboring Enceladus”.

The image is best enjoyed by looking at the high resolution verions at NASA’s Photojournal site you can see down to 250 meters per pixel – amazing!

Image Credit: NASA/JPL-Caltech/Space Science Institute/Lunar and Planetary Institute

Agilkia

Four-image mosaic of Comet 67P/C-G on 30 October. Credits: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

Four-image mosaic of Comet 67P/C-G on 30 October. Credits: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

Landing “Site J” on Comet 67P/Churyumov-Gerasimenko has a new name and that name is Agilkia.

From ESA

Agilkia is an island on the Nile River in the south of Egypt. A complex of Ancient Egyptian buildings, including the famous Temple of Isis, was moved to Agilkia from the island of Philae when the latter was flooded during the building of the Aswan dams in the 20th century.

Pretty good name I think and so do others, the name was proposed by 150 of the participants of public competition held by ESA and the German, French and Italian space agencies.

The image shows Agilkia in one of those four-part mosiacs ESA has been releasing. Very nice resolution panels so do check it out.  This is one of the last looks as Rosetta left the 10 km orbit to get ready to deploy Philae on 12 November.

A Dark Saturn

Saturn and Titan. Image Credit: NASA/JPL-Caltech/Space Science Institute

Saturn and Titan. Image Credit: NASA/JPL-Caltech/Space Science Institute

A look at a dark Saturn and Titan in this Cassini image. This view is looking pretty much towards the Sun providing a look at the atmosphere of Titan and a very nice crescent on both.

These observations can tell us something of the compositions and physical states of the atmospheres. You will notice the crescent goes almost all the way around Titan, this is due to small haze particles in the upper atmosphere refracting the sunlight.

For a sense of scale the view is from 1.7 million km or 1.1 million miles from Saturn and yet we don’t see the entire planet.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA’s Science Mission Directorate, Washington. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.

via NASA’s Photojournal PIA18291