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Displaying results 1 - 10 of 68 items found.

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1. Isostasy, gravity, and the Moon: an explainer of the first results of the GRAIL mission

(Web Page; Wed Dec 12 14:04:00 CST 2012)

Last week the GRAIL lunar gravity mission published their first scientific results, and what they have found will send many geophysicists back to the drawing board to explain how the Moon formed and why it looks the way it does now. To e...

Description: Last week the GRAIL mission published their first scientific results, and what they have found will send many geophysicists back to the drawing board to explain how the Moon formed and why it looks the way it does now. To explain how, I'm going to have to back way up, and explain the basic science behind gravity data.

2. How GRAIL will meet its end

(Web Page; Thu Dec 13 17:30:00 CST 2012)

The twin GRAIL spacecraft are nearly out of fuel, and are being directed to a controlled impact near the north pole on the near side of the Moon on December 17. Ending the mission in this way has been planned all along; the news here is ...

Description: The twin GRAIL spacecraft are nearly out of fuel, and are being directed to a controlled impact near the north pole on the near side of the Moon on December 17. Before the end, though, they did some cool things, including flying within 2000 meters of mountaintops, and catching video of Lunar Reconnaissance Orbiter in flight.

3. GRAIL, the next Discovery mission

(Web Page; Mon Apr 23 02:02:00 CDT 2012)

As a surprising number of you have written in to remind me, I've neglected to mention a big announcement made last month, that the next Discovery mission, to be launched in 2011, will go to the Moon. The mission is called GRAIL, which i...

Description: GRAIL, the next Discovery mission

4. GRAIL A and B are on their way to the Moon!

(Web Page; Fri Feb 07 14:30:00 CST 2014)

After some exasperating delays due to pesky and changeable high-level winds, the twin GRAIL spacecraft launched this morning on their trip to the Moon. Official launch time was 13:08:52.775 UTC on September 10, 2011. Go GRAIL! About...

Description: After some exasperating delays due to pesky and changeable high-level winds, the twin GRAIL spacecraft launched this morning on their trip to the Moon.

5. Pretty picture: Talking to GRAIL

(Web Page; Fri Feb 07 14:36:00 CST 2014)

A lovely picture from the Canberra DSN this morning, showing two of the workhorse 34-meter antennas communicating with the nearby GRAIL spacecraft. In the distance, the huge DSS-43 talks to the solar observatory STEREO-B.

Description: Here's a lovely picture from the Canberra DSN this morning, showing two of the workhorse 34-meter antennas communicating with the nearby GRAIL spacecraft. In the distance, the huge DSS-43 talks to the solar observatory STEREO-B.

6. GRAIL update: Next launch attempt planned for Saturday

(Web Page; Fri Feb 07 13:31:00 CST 2014)

Just a brief update: SpaceflightNow reports no attempt will be made to launch GRAIL tomorrow. The next launch opportunity is Saturday. "Two one-second opportunities will be available, the first at 8:29:45 a.m. and the second at 9:08:52 a...

Description: Just a brief update: SpaceflightNow reports no attempt will be made to launch GRAIL tomorrow. The next launch opportunity is Saturday.

7. How to watch the GRAIL launch on Thursday

(Web Page; Fri Feb 07 13:11:00 CST 2014)

The twin spacecraft of the GRAIL lunar gravity mission are set to launch side-by-side on a Delta II rocket on Thursday, September 8. The launch may happen on the 8th in either of two instantaneous launch windows at 5:37 or 6:16 Pacific (...

Description: The twin spacecraft of the GRAIL lunar gravity mission are set to launch side-by-side on a Delta II rocket on Thursday, September 8. Here's all the places where you can find information about the upcoming launch.

8. Here we go again: GRAIL set to launch today

(Web Page; Fri Feb 07 14:16:00 CST 2014)

GRAIL is trying for launch today at 8:29 PDT / 12:29 UT or 9:08 PDT / 6:08 UT., and here I am at 5:00 am my time ready to watch. As before, I'm watching the feed through Spaceflight Now's GRAIL mission status center. Another good place t...

Description: GRAIL is trying for launch today at 8:29 PDT / 12:29 UT or 9:08 PDT / 6:08 UT., and here I am at 5:00 am my time ready to watch. As before, I'm watching the feed through Spaceflight Now's GRAIL mission status center.

9. Geek craft: GRAIL twins Ebb and Flow in plastic canvas

(Web Page; Tue Jul 29 13:34:00 CDT 2014)

Those of you who follow me on Twitter know that after beginning with Dawn last week, I've kept my fingers busy, stitching more spacecraft from plastic canvas. I now have prototypes for GRAIL, New Horizons, and MESSENGER (though I'm not c...

Description: Those of you who follow me on Twitter know that after beginning with Dawn last week, I've kept my fingers busy, stitching more spacecraft from plastic canvas. I now have prototypes for GRAIL, New Horizons, and MESSENGER.

10. GRAIL MoonKAM's first (released) video of the Moon

(Web Page; Sat Sep 13 11:06:00 CDT 2014)

I could watch this video a hundred times. It's basically a cell phone video shot by a spacecraft in orbit around the Moon. It's the first release from MoonKAM, tiny cameras included on both GRAIL spacecraft whose only purpose is public o...

Description: Here's the first release from MoonKAM, tiny cameras included on both GRAIL spacecraft whose only purpose is public outreach. Classrooms can sign up for opportunities to propose sites to image.

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