Some Space Questions

[Future_SSJGohan]

Hi, I have been getting intrested in the topics about space, especially on the big bang theory, and the removal of pluto from our solar system... but i do not want to jump the gun and move on.

I need some questions answered.

Please correct my explanation
ok..
we live in a universe,which consists of numerous galaxies, and each galaxy is made up of numerous solar systems, one being ours, which is the sun & 8 planets.

Now, the milky way galaxy is just one of the numerous galaxies, and what makes it so special is the fact that it holds our solar system...

Is everything I said true?

Thanks for the help.

 

[MC]

Hi, I have been getting intrested in the topics about space, especially on the big bang theory, and the removal of pluto from our solar system... but i do not want to jump the gun and move on.

I need some questions answered.

Please correct my explanation
ok..
we live in a universe,which consists of numerous galaxies, and each galaxy is made up of numerous solar systems, one being ours, which is the sun & 8 planets.

Now, the milky way galaxy is just one of the numerous galaxies, and what makes it so special is the fact that it holds our solar system...

Is everything I said true?

Thanks for the help.

So far it is correct, though of course there are numerous ways to explaining the universe. It can be speculated that there are numerous other solar systems since we have yet to prove that, but there is a strong possibility. Not to mention you also have the Multiverse theory, meaning that there is more than one universe, but of course that still has yet to be proven.

 

[sub]

http://en.wikipedia.org/wiki/Universe

This would make the volume, of the known universe, equal to 1.9 ? 1033 cubic light years (assuming this region is perfectly spherical). As of 2006, the observable universe is thought to contain about 7 ? 1022 stars, organized in about 100 billion (1011) galaxies, which themselves form clusters and superclusters. The number of galaxies may be even larger, based on the Hubble Deep Field observed with the Hubble Space Telescope. The Hubble Space Telescope discovered galaxies such as Abell 1835 IR1916, which are over 13 billion light years from Earth.

Both popular and professional research articles in cosmology often use the term "universe" when they really mean "observ

Wow. 100 billion galaxies. Really makes you think.

Edit: And yeah, everything you said is correct like MC said.

 

[Future_SSJGohan]

Alright, good.. Ok next... I have a question on the planets. I once saw a fascinating movie, called the "privilaged planet", which talks about the earth's position in our solar system, and how it is placed in a region where its not too close to be burned by the sun, or not too far away, to freeze. It is in the perfect location that suits life. I know that planets rotate, through graviational pull to the sun, but are there cases, where it can actually move closer, or away from the sun? If so, that would surely kill humanity.

To MC's reply: Didn't they find more and more planets? Doesn't that automatically prove the existence of other solar systems?

In addition, if there are solar systems grouped together in one galaxy, would a planet in one solar system, have a small gravitational attraction to another nearby solar system?

 

[MC]

Alright, good.. Ok next... I have a question on the planets. I once saw a fascinating movie, called the "privilaged planet", which talks about the earth's position in our solar system, and how it is placed in a region where its not too close to be burned by the sun, or not too far away, to freeze. It is in the perfect location that suits life. I know that planets rotate, through graviational pull to the sun, but are there cases, where it can actually move closer, or away from the sun? If so, that would surely kill humanity.

To MC's reply: Didn't they find more and more planets? Doesn't that automatically prove the existence of other solar systems?

In addition, if there are solar systems grouped together in one galaxy, would a planet in one solar system, have a small gravitational attraction to another nearby solar system?

The possibility of Earth getting closer to the Sun is quite possible in my opinion, just that it would take a very long time for any noticable changes. Most people speculate that humanity will not be around to see the destruction (caused by natural occurances) of the Earth.

They did find more planets, though they considered them part of our solar system due to there orbital patterns if I'm not mistaken.

I don't think the overall mass of the solar system would be strong enough or at least reach far enough to affect another (that's if other solar systems exist). Especially since the solar systems would be too far apart from each other.

 

[sub]

Alright, good.. Ok next... I have a question on the planets. I once saw a fascinating movie, called the "privilaged planet", which talks about the earth's position in our solar system, and how it is placed in a region where its not too close to be burned by the sun, or not too far away, to freeze. It is in the perfect location that suits life. I know that planets rotate, through graviational pull to the sun, but are there cases, where it can actually move closer, or away from the sun? If so, that would surely kill humanity.

That's not the only factor that plays a part in how warm or cold the Earth is. A big factor is the angle of the Earth. The coldest month of the year is January for example and that's the point in time at which the Earth is closest to the Sun, but because of the angle of the earth, it's cold. Anyway, unless some catastrophic event happens such as a meteor hitting the Earth and changing it's orbit, the Earth will keep moving in the orbit that it's in today.

Just a general note - Life doesn't necessarily need the conditions of Earth to survive. Just because life on Earth needs water to live doesn't mean life on other planets would need water to live, life doesn't have to be defined as the rigid definitions we have on Earth. Anything could exist out there.

To MC's reply: Didn't they find more and more planets? Doesn't that automatically prove the existence of other solar systems?

In addition, if there are solar systems grouped together in one galaxy, would a planet in one solar system, have gravitational attraction to another nearby solar system?

Uh, there are billions [trillions?] of solar systems out there.

 

[Future_SSJGohan]

Just a general note - Life doesn't nessicerily need the conditions of Earth to survive. Just because life on Earth needs water to live doesn't mean life on other planets would need water to live, life doesn't have to be defined as the rigid definitions we have on Earth. Anything could exist out there.

Yeah your right... which brings up the idea of aliens, or other types of creatures..

 

[sub]

http://forum.esforces.com/showthread.php?t=65620

The thread is dead so don't post in it.