Showing posts with label astronomy. Show all posts
Showing posts with label astronomy. Show all posts

Sunday, July 26, 2009

Astronaut bases scientific conclusions on perceptions and feelings.

With absolutely no measurements or scientific data, Canadian astronaut Bob Thirsk announced to the world that the Earth “bears scars” of human destruction.  Although he acknowledged this “perception” was probably wrong that didn’t stop him from feeling sad at witnessing the damage to the Earth visible only to him through his feelings. 

"This is probably just a perception, but I just have the feeling that the glaciers are melting, the snow capping the mountains is less than it was 12 years ago when I saw it last time," Thrisk said. "That saddens me a little bit."

Earth bears scars of human destruction - astronaut | Reuters

Friday, July 17, 2009

CBS News - Apollo 11 Moon Landing, July 1969


CBS News - Apollo 11 Moon Landing, July 1969 - part 1!!
Uploaded by videohollic - Check out other Film & TV videos.

Most think of the achievement of the “moon landing” as Neil Armstrong stepping on the lunar dust. I don’t; I chose this 10 minute time period because I thought it’s the most significant achievement of the “moon landing.” It was “Buzz” Aldrin who said the landing was the hard part. After all, once you have landed then it’s a simple matter to get out and walk around.

Even getting to the moon was not that hard. As soon as Robert Goddard build his first liquid fueled rocket in the 1930’s he realized that it would be possible to travel to the moon. (So did Nazi scientists such as Werhner Von Braun, who helped design the Saturn V rocket used to go to the moon).

No, the real achievement was that last 10 minutes of “powered descent” where the landing craft had to slow down from “space travel speed” to a near dead stop just at the surface of the moon. This technique was perfected by none other than semi-madman Howard Hughes, who built the first spacecraft to land safely on the moon.

In this clip you’ll hear some drama that we didn’t know much about at the time. You’ll hear those pesky “program alarms” indicating the computer was overloaded. Notice there’s a long pause where they ask about their “delta h” and “what do you want us to do with that alarm?” What he was asking was “are we gently descending to the moon or are we plummeting to our deaths? Um, any time you’d like to tell us would be great.”

Notice also the CBS “animation” is great, but at the end it’s off by almost a minute. These things are supposed to be figured to the microsecond! So what was going on?

They were supposed to land at the time the animation shows. And it’s confusing because you hear the astronauts call out “lights on” just as the animation shows a light coming on. But those are different lights! The animation shows the “contact light” but the light they were announcing was the low fuel light and they were nowhere near landing in reality. You can hear a guy on the ground give a terse “sixty seconds” (one minute of fuel remaining). What had happened, unknown to anyone on Earth at the time was that the computer was guiding them right to an unsuitable landing site; so Armstrong had to take over control and slide forward a little and then land. Just before they land you can hear that guy scream “thirty seconds!” He was reminding them, in NASA speak, that bad things would happen in 30 seconds.

There’s actually a film of these same events from inside the lander. I like that video too. But this one shows Walter Cronkite who died today at age 92.

Dailymotion - CBS News - Apollo 11 Moon Landing, July 1969 - part 1!! - a Film & TV video

Thursday, May 28, 2009

Hubble Space Telescope cheats time



In this video captured by astronaut and friend of Manteca Live! Michael J. Massimino,
John M. Grunsfeld and Andrew J. Feustel are shown discussing their "space walks" and repairs they made to the HST. At one point, Feustel floats a tribute. Maybe they were flying over city hall? (not possible - but a nice try - ha!)

(I'd put the video here but the format's giving me agita. The images above are actual screen captures with no alterations or monkey business. See STS-125 Flight Day 8 Highlights, at about 7:30)

Extra credit: can anyone speculate on what this is and what's it's relation to NASA?

Wednesday, February 20, 2008

moonrise

This is what the moon looked like when it rose tonight. It was already half obscured by the earth's shadow.



There was quite a bit of interest in the neighborhood!










And after the moon moved into the shadow completely, this is about what it looked like (this photo is with the color balanced "locked" on daylight, so the reddish color is pretty much how it looked.):

Saturday, September 23, 2006

ISS's headin' right fer us!

Here's a special treat for regular Manteca Live! readers.

Tomorrow morning (Sunday morning, at about 5:46 am) the International Space Station will be passing almost directly over Manteca.

And, you can see it if you go outside and simply look up at the right time! It should look like a blazing star streaking across the sky. They just added another array of solar panels, which should add to the brightness of the station as it passes. You will be one of the first to see the new configuration.

Viewing is not difficult, but you do need to know where and when to look. Go outside around 5:45 am. Then, look toward the South-West, about halfway between the horizon and zenith (straight up). If you are lucky, you should see a bright "thing" suddenly appear. This is one of the unique aspects of this viewing opportunity -- The station will be passing from darkness into light, and it should look like it "just appears" in the sky. On board the station, they are experiencing one of the many daily "sunrises." The station should appear about 5:45:48. An accurate time source is helpful.

The Station is so bright, it's hard to miss. You can refer to the charts for the more information. Good luck!