Category Archives: History

Ranger 8

Launched on 17 February 1965, Ranger 8 reached the moon on 20 February when it impacted the surface. The spacecraft sent back some of the closest images of the lunar surface and helped select landing sites for the Apollo missions.

Ranger 8 impacted the surface at something a little less than 2.68 km/sec or 6,000 mph. I spent a bit of time looking for the possible impact site in LROC data, still looking too.

Video

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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

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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

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End of an Era

When NASA astronauts and any support staff that might have to quickly exit the had to get off the 60 meter/195 foot level of Launch pad 39A and B at Cape Canaveral they would do so by using slide-wire baskets.

The baskets could hold three people could get in the baskets at the Fixed Service Structure and travel 366 meters/1200 foot to safety in just about 30 seconds. The braking system was a drag chain braking system and a catch net.

via Live Leak

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Neptune’s Clouds

Voyager's look at clouds on Neptune.  Credit: NASA Jet Propulsion Laboratory / NASA Planetary Photojournal
Voyager’s look at clouds on Neptune. Credit: NASA Jet Propulsion Laboratory / NASA Planetary Photojournal

The bit of an interlude in the ESA’s Comet watch blog is a good time to look at some of Voyager 2’s images of Neptune. This is one of my favorites. I don’t really know if there is more than coincidence that the New Horizon’s spacecraft crossed the Neptune orbit 29 years almost to the day after Voyager started its Neptune encounter.

There is a lot of comparisons being drawn between the New Horizon’s and Voyager missions. Hey I’m on board with it. If I had my way there would be a “Le Verrier” or “Galle” spacecraft, a Neptune analog of the Cassini spacecraft in orbit right now.

In case you were wondering what was going on with Rosetta, everything is fine. Mission managers are looking at images from as close as 50 km trying to select the best landing spot. New images will be posted shortly.

This image comes from NASA’s Solar System Exploration (and Planetary Photojournal) site:

This Voyager 2 high resolution color image, taken 2 hours before closest approach, provides obvious evidence of vertical relief in Neptune’s bright cloud streaks.

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20 Years Ago

sl9impact

20 years? Already? Hard to believe but true.

Comet Shoemaker-Levy 9 impacted the planet Jupiter 16 July 1994. The comet broke up under the influence of the gravitational pull of the planet during a close pass in July 1992 (was within the Roche limit) and impacted two years later.

The image above is one of many images you can find at our Comet Shoemaker-Levy 9 page. Be sure to visit the links for the legendary Eugene Shoemaker too.

Image credit: NASA et.al

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