Astronomy & Space

Would firing a gun at the right angle on the moon put the bullet in orbit

Or would the bullet have escape velocity from the moon? and either: Crash into the earth, Orbit the earth, Crash into the sun, Orbit the sun Or would it not be able to escape and simply fall back to t

What would happen if the sun was blocked out for a few days

What would happen if the sun was blocked out for 3 or for days??-If a shadow was cast over the entire earth. We would die. How fast? Well if the shadow was cast by something being directly in front of

If everything in the universe increased its size by 10 or 100 times except the universe itself, what would

happen?-Everything would come to everything else at a faster rate. Imagine two galaxies oming toward one another. If their masses increased then the gravitational attracion between them would thus inc

Why does Earth only have one moon, and why is it so large comparatively

Every other planet (eight now, right?) has several moons. And they are small compared to their planet. Why do we only have one, and why is it, comparatively, so small? Why hasnt Earth attracted in an

What are some things invented specifically for space missions

Like Velcro and Tang?-Velcro, Tang, Teflon (non-stick surfaces), space suits, cranes, propulsion systems, etc. Many propulsion systems have been invented specifically for certain missions, and then h

Will VY Canis Majoris Blow up soon

Since its so big shouldnt it become a supernova in a couple years?-Yes. Of course, you have to realize that, for an astrophysicist, soon means some time in the next 10,000 years!-There is a differenc

Serious question about Chernobyl

you know chernobyl the irradiated place well can people like go there if they really wanted to like are thier guards or something? i know thell probaly become irradiaded and die but still......and not

What exactly is a "light year"

Its kinda a dumb question but I was wondering-A light year (ly) is the distance light travels in one year. The total number of miles in a light year is 5,865,696,000,000 miles. Just a little fun fact

If light travels 8 minutes from Sun to Earth and 5 hours from Sun to Pluto, how far is Pluto from the Sun

Answer in AU please and Thank you!-37.5 AU Sun --> Earth = 1AU = 8 Sun --> Plut = xAU = 5 hours 5 hours = 300 minutes 300 / 8 = 37.5 37.5AU Hope this helps Dougie :)-300 light-minutes ----------------

Orbit of a comet has a semimajor axis 73 AU how many years does it take the comet to complete it's orbit

Could you please show the work? Thank you!-P^2 = 73 ^3 38901700^0.5 = 623.7122734 years

What would be the angle between the sun and southern horizon at noon ont he winter solstice at 21 deg N lat

Please show your work...Thank you!-Heres the answer -- no charge! Suppose youre at latitude L. If youre in the northern hemisphere, the declination on the southern horizon (due south, ignoring refrac

What's planet and what does it have to do with 2012

I heard that 2012 there was a planet x that will come and collide with earth. Can someone explain this to me with more detail?-Thats just an urban myth. You can read more about it here: http://www.uni

How do magnets work? honestly need help no lying scientists

like really all those scientist are lying and making me pissed-They arent lying, necessarily. The truth is, scientists dont really know.They are just beginning to understand the nature of forces such

Do you think America should continue the space program

It IS continuing, despite the Congress that was elected into office in 2010 cutting NASAs 2011 budget. I take 6 injections of human RNA cloned insulin EVERY day. The techniques for doing that were ref

Where is Planet Earth

Its over here, where are you e-mailing from?-Earth (or the Earth) is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest o