Question

inner planet of solar system are rocky, whereas outer planets r gaseous. y?

Answer 1

Hello Nazima :)

I think this can be answer like this. When our solar system were formed, the inner parts are much warmer than outer parts. since gas evaporated. and well before formation of solar system our Sun were formed. So during the formation of Sun all were blown out, rocks heavier than gas so rocks remain still while gases moved to farther extent.

Does this helped you?

Answer 2

@: Shayaan_Mustafa: You are completely wrong. But, I appreciated your thinking at your age. You are right at your place and I am happy that you applied something form your previous knowledge.

During the formation of Sun there is no rocks present. All the rocks, etc are formed during their evolution.

REF: http://wiki.answers.com/Q/Why_the_inner_planets_of_the_solar_system_are_rocky_whereas_the_outer_planets_are_gaseous

The early solar system comprised of a disk of gas which was hot near the newly formed protosun (about 2000 degrees Kelvin) and cooler at further distances.

Rocky substances condensed at the higher (inner) temperatures, while icy substances condense at much lower temperatures further out (about 200 degrees Kelvin) and hydrogen and helium at lowere temperatures still - just above absolute zero. So in the early stages, the inner solar system was rocky, while the planets forming in the outer regions of the solarsystem were made from (and accumulated) ice and gas. Things have pretty much remained this way since.

Answer 3

Thnx. But If you see journey to the end of universe documentry courtesy of National Geographic channel (I think episode 7 or 5, don't remeber correctly) you will get your answer about rocks.

Answer 4

and also inner planets are the solids; solar winds also contribute to this. Do you know how?

Answer 5

This is just one of the theories, Shayan and Nazima. I read up on it and there are multiple theories, none of which are totally ascertained.
http://www.bobthealien.co.uk/outer.htm
http://van.physics.illinois.edu/qa/listing.php?id=1110
http://answers.yahoo.com/question/index?qid=20081112202133AAjBA3E

Check these out.

Answer 6

yes apoorvk you are right. there are thoeories. albedo is also one of the main concentration of these thoeories..

Answer 7

@shayaan_mustafa @ramkrishna @apoorvk there r some options
if they help
1) solar heat drove away the gases to the outer region of solar system
2) gravitatioal pull of the sun pulled all rocky material to innersolar system
3) outer planets r larger than inner ones
4) comets delivered the gaseous materials to the outer planets.

Answer 8

what to do with these madam?

Answer 9

which one is most appropriate?

Answer 10

1 is the most appropriate, followed by two.
3 doesn't apply here and 4 seems too nonsensical in this case.

Answer 11

I will go with first one. although solar wind also contributed to these as I said above.

Answer 12

i hope you can estimate first choice. why apoorvk and me choose first.

Answer 13

thanku this helped:)

Answer 14

ok miss you are welcome.

Answer 15

:)

Answer 16

I think 1st option is more suitable.