2006-11-12 23:17:45 · 23 answers · asked by JEGA N 1 in Science & Mathematics ➔ Astronomy & Space
Largest known to date is the "puffy planet" HAT-P-1b orbiting the sunlike star ADS 16402 B, one of a binary pair of G0 V stars 450 light yeard away, in the constellation Lacerta. Our sun is of spectral class G2 V i.e. a little cooler than ADS 16402 B.
HAT-P-1b has a radius of 1.36 x the radius of Jupiter.
It was discovered on 13 September 2006 and is 450 light years away. It has the lowest density of any known extrasolar planet. It also has the name Krais.
It was announced as follows:
"Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of the double star system ADS 16402 AB. This system is a pair of G0 main-sequence stars with age about 3 billion years, at a distance of ~139 parsecs and projected separation of ~1550 AU. The transit signal has a period of 4.46529 days."
Note: Only the radii of transiting planets are known.
2006-11-13 01:14:30 · answer #1 · answered by Anonymous · 12⤊ 0⤋
Jupiter is the largest planet in our solar system. The "universe" includes everything in existence, every solar system in every galaxy. It's theorized that the universe contains at least 100 billion stars, which conceivably means there are trillions of planets. Which one of those is the biggest? Nobody on our planet knows for sure.
2006-11-13 07:35:39 · answer #2 · answered by Michael H 4 · 1⤊ 0⤋
in our universe no one knows because it's only been about 10 years since we've started finding the first planets gravitating around some (not too distant) stars in our galaxy.
so as far as the rest of the universe is concerned, who knows.
this being said it seems likely that the largest planets in the universe would be gas giants, like Jupiter.
Now any time the mass of one of these would reach about 13x the mass of Jupiter, it would become a "brown darf" star, i.e. would start to have nuclear fusion at its core.
Therefore it is pretty safe to say that, anywhere in the Universe, the most massive planets would be gas giants just below that limit, so maybe up to 12x more massive than Jupiter.
Hope this helps
2006-11-13 07:48:37 · answer #3 · answered by AntoineBachmann 5 · 2⤊ 0⤋
We can't see all of the planets in this UNIVERSE to answer this question, but in our SUN/SOLAR system JUPITER would be the biggest. The universe is all of space.
2006-11-13 07:31:38 · answer #4 · answered by spir_i_tual 6 · 0⤊ 0⤋
There is a gas giant orbiting the star HD 114762 which is about 9 times the mass of Jupiter.
It has never been seen, but was detected by the 'wobble' effect it has on the star.
As far as I know that's the biggest in the KNOWN universe.
2006-11-13 07:28:46 · answer #5 · answered by Thomas V 4 · 0⤊ 0⤋
No one knows the answer to that one.
People will say Jupiter but that is in our solar system so there may be and they already know there are planets larger in the universe.
2006-11-13 07:38:55 · answer #6 · answered by Anonymous · 1⤊ 0⤋
No one knows the answer to that, but the largest in the solar system is Jupiter. It's approximately 348 times larger than the earth and has 2.5 times the gravity of earth.
2006-11-13 09:28:35 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Amongst the 150+ planets detected outside our solar system, some are larger than Jupiter according to this :
http://www.eurekalert.org/pub_releases/2006-01/pu-rds012506.php
2006-11-13 07:24:56 · answer #8 · answered by Otter 6 · 1⤊ 0⤋
Well, Jupiter is the biggest planet in our solar system. Beyond our solar system, no one really knows.
2006-11-13 07:33:24 · answer #9 · answered by bldudas 4 · 0⤊ 0⤋
Some are saying Jupiter, but that is just our Galaxy, The Milky Way. To this day, the Universe has NEVER been fully explored & probably never will be. So, at this time, there is no possible way of knowing the answer to that question.
2006-11-13 07:30:40 · answer #10 · answered by Sparky 3 · 1⤊ 1⤋