Astronomy & Space - November 2007

Say this year you find out that your dad's best friend died in a fire in 1983. Soon, time travel is discovered. If you go to 1983 and save your dad's friend, wouldn't a paradox result? If you save him in 1983, the future you had no reason to go back to 1983 in the first place. Right? Plus, what would happen to everyone in the future who knew the guy died? Would he suddenly materialize? Doesn't time travel sound impossible because of these problems?

2007-11-20 17:14:12 · 13 answers · asked by Sheldon119 2

Jupiter, Saturn, yada. This seems to be the stuff of stars. Now I am no physics or mathematical student (let alone a genius). They sound to me like failed stars. Let's assume they are. My question is this, "Would it still be possible for them to 'ignite?'"

2007-11-20 17:09:15 · 5 answers · asked by Robert O 7

I know the sun has strong gravity.But If our sun pulled our planet from some other place and pulled us this close why doesn't it keep on pulling us into it? Basically why doesn't the suns gravity(pull) suck us in the sun itself?

2007-11-20 17:09:02 · 9 answers · asked by Anonymous

2007-11-20 16:56:46 · 9 answers · asked by JuanSC 2

The star charts I looked at indicate that Holmes is going to do a 180'

2007-11-20 16:54:00 · 2 answers · asked by Anonymous

2007-11-20 16:38:09 · 9 answers · asked by JuanSC 2

2007-11-20 15:52:31 · 11 answers · asked by Juice 1

was that really true?

2007-11-20 15:50:50 · 15 answers · asked by ghoulart 1

What is the difference between reflector, refractor, zoom? and what is altazimuth mount? does red-dot projection viewfinder help? what does a diagonal viewer do? will he actually be able to see the rings of Saturn, moons of Jupiter, the moon's craters?

2007-11-20 15:32:46 · 6 answers · asked by Anonymous

I really really really really really want to make a wish over a shooting star. When will they come out?

2007-11-20 15:18:37 · 9 answers · asked by Anonymous

2007-11-20 15:10:50 · 8 answers · asked by Anonymous

Asking those that have actual knowledge of the capabilities of the equipment. Not intended to start a moon landing hoax debate. Thanks!

2007-11-20 14:59:48 · 4 answers · asked by Just Me 2

Which ones are true?

1. The Moon lost its atmosphere because of its low gravity.
2. The We think the Earth and Moon are both about 4.6 billion years old.
3. The Earth has an atmosphere of nitrogen and oxygen because of the processes of life and death.
4. Differentiation in the early molten Earth caused heavier elements like iron to sink while the lighter elements and rocks stayed on the surface.
5. Tides on the Earth have slowed its rotation.
6. At the present time the main heat source for the Earth's core is radioactivity.

2007-11-20 12:57:15 · 10 answers · asked by Angelical Abby 4

Would it appear as large as our moon does in our sky?

2007-11-20 12:38:40 · 3 answers · asked by Professor Armitage 7

2007-11-20 12:08:08 · 9 answers · asked by betterthanjesus3 1

Is this even a valid question? If a star emits some photons, it has effectively transferred some of it's energy into light right? Now, this energy may spend eons tied up in a photon so as long as it does not hit anything. Does this happen? If so, does this represent a significant ammount of energy?

2007-11-20 11:44:35 · 1 answers · asked by Nick D 2

2007-11-20 11:05:47 · 4 answers · asked by Anonymous

in your chair at work

2007-11-20 11:03:52 · 14 answers · asked by Anonymous

I know it is sci-fi but on armageddon too, things blow up in space. - I thought one needs oxygen for combustion?

2007-11-20 10:56:48 · 12 answers · asked by Anonymous

Last week, for the first time ever, I noticed that the moon, while in a crescent stage , was very, very royal blue on the inside of the crescent. I found it very odd and watched it off and on foe over three hours as it moved across the sky. It did not change. Has anyone else ever seen this?

2007-11-20 10:55:06 · 7 answers · asked by yoohoo64 2

I can't find where to subscribe . I heard you can

2007-11-20 10:51:37 · 6 answers · asked by Planet22 2

2007-11-20 10:34:42 · 11 answers · asked by Anonymous

2007-11-20 10:12:00 · 3 answers · asked by Jansen J 4

I have to write a paper and i'm finding to many varying answers.

Which ones are right?

The Sun's rays are more perpendicular in the summer.
The Earth is closer to the Sun in summer.
The Earth's axis is tilted away from the sun in summer.
The Sun is up in the sky for longer in the summer
The Sun has a slight yearly change in the light it emits.

2007-11-20 09:59:22 · 5 answers · asked by Angelical Abby 4

If you could participate in a hot debate over the need for a new definition of a planet...
What would be the main point you'd argue? Would you be for or against it?, why and why not?, and where is your stance in the controversy it's created surrounding Pluto? Was demoting Pluto...the right decision?, why or not?

(Not asking for an essay, this is part of a research project)

2007-11-20 09:57:09 · 3 answers · asked by Emocide Organ 3

Show proof and explain your answer (not to graphic...gross)

2007-11-20 09:54:11 · 5 answers · asked by ss 2

And would this have na effect on the Earth's orbit?

2007-11-20 09:36:43 · 12 answers · asked by peaches & love 1

I need to make a poster about reconnaissance satellites. The problem is, there isn't much declassified information about them because they're mostly classified by the government. I was hoping someone could help me out. On the poster I need to include: general weight and size, structure, what instruments these satellites use, their primary user, specific tasks of reconnaissance satellites, their type of orbit and typical orbital path and height, and other related information, like their history, development, and future. Thank You !!!

2007-11-20 09:08:35 · 6 answers · asked by pjp 1

What I'm curious about,is the scenerio of what would happen if we had a "near miss?"...a comet or asteriod skimming our gravitational field....would we spin out of control or just experience wild tidal patterns etc etc???

2007-11-20 08:48:30 · 11 answers · asked by omegaman 2

I live in Northern VA, and I don't know where Perseus is. Where would I look? A picture would help greatly.

2007-11-20 08:46:48 · 3 answers · asked by Anonymous