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2006-07-09 22:53:21 · 12 answers · asked by Anonymous in Science & Mathematics Astronomy & Space

12 answers

pluto

2006-07-09 22:57:21 · answer #1 · answered by Anonymous · 0 0

Pluto Discovered on February 18, 1930.Pluto is the ninth and smallest of the traditional planets of the Solar system, though its status as a planet has been disputed in recent years. [1] It has an eccentric orbit that is highly inclined with respect to the other planets and takes it closer to the Sun than Neptune during a portion of its orbit. It is also the smallest planet and indeed is smaller than several moons of other planets (see the list of solar system objects by radius). Pluto itself has a large moon named Charon; two small moons named Nix and Hydra were discovered in 2005. The New Horizons spacecraft, which lifted off from Cape Canaveral, Florida on January 19, 2006, is expected to become the first spacecraft to fly by Pluto on July 14, 2015.

Pluto's astronomical symbol is a P-L monogram, ♇. This represents both the first two letters of the name Pluto and the initials of Percival Lowell, who had searched extensively for a ninth planet and who had lent his name to the observatory that eventually discovered Pluto. (Another symbol sometimes used for Pluto is an astrological symbol and not an astronomical one. It resembles that of Neptune, ♆, but has a circle in place of the middle spoke of the trident.)

2006-07-10 07:32:03 · answer #2 · answered by Miss LaStrange 5 · 0 0

They all formed at about the same time, and settled into more-or-less their present forms when the sun lit up, about 4.6 billion years ago.

AFAIK, the Earth's moon is the only large body in the solar system to have formed since then--it's generally believed to have been created when a Mars-size body smashed into the early Earth, about 400-500 million years later.

The asteroids have been chipping bits off each other ever since then, so if you look around long enough, you could probably find a very young one. The outer system bodies--comets up to Pluto usually stick together when they collide, so they've just been getting bigger like giant gumballs for the last 4.5 billion years.

2006-07-10 08:27:16 · answer #3 · answered by tomrlutong 3 · 0 0

I believe all of the planets are roughly the same age, except for Pluto which may be older or younger. Pluto is the latest discovered planet (that has been confirmed as a planet) but that is no indication to how long it's been in existence.

2006-07-10 10:14:09 · answer #4 · answered by Isis-sama 5 · 0 0

All the planets were formed at same time from the shrinking disc of proto sun.However as the disc shrinked, outer planetesimals separated earlier than the inner planets.In this way Mercury is the youngest planet of all. Further the Gas giants are still shrinking and their formation process is yet not complete and in one sense they are yet to be born.The choice is yours.

2006-07-10 08:40:16 · answer #5 · answered by Devil-heart 2 · 0 0

I think all the Planets were created at the same time. Only some of them we have discovered late.

So as per age all are of same years old. As per our knowledge the youngest if the Planet X or XENA.

2006-07-10 07:14:12 · answer #6 · answered by Anonymous · 0 0

I could of swore all of the planets appeared at the same time and pluto is just the most recently discovered.

2006-07-10 06:15:27 · answer #7 · answered by mathias1314 3 · 0 0

Pluto

2006-07-10 05:56:47 · answer #8 · answered by Sunshine 3 · 0 0

all planets in the system were formed a same time

2006-07-10 07:20:33 · answer #9 · answered by yohannvt 1 · 0 0

'Xena' is d youngest & 10th planet in our solar system.

2006-07-10 07:05:12 · answer #10 · answered by kitu 1 · 0 0

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