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Largest Exoplanets
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Lines blur between planet and full-blown star
Pluto huggers and haters may hog the spotlight, but there's another debate on the bigger end of the planetary scale. Astronomers have in recent years uncovered super-massive objects that blur the boundary between planet and full-blown star.
The complications go beyond simply defining stars as undergoing thermonuclear fusion. Planet hunters peering at distant stars have found huge orbiting objects that dwarf Jupiter, the largest gas giant planet in our solar system. Such finds may represent the missing links on the sliding scale between planets and stars.

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The largest exoplanets so far discovered are:


HAT-P-1b, is nearly 1.4 times larger than Jupiter. It is located 450 light years away in the constellation Lacerta.
TrES-4, is gas giant that is 70% larger than Jupiter. It is located 1,400 light years away in the constellation Hercules.
Wasp-17b,  is twice the size of Jupiter. It is located 1,000 light years away.
HR 8799 has planetary trio that orbits the star. The planetary masses are between 5 and 13 times that of Jupiter. It is located 130 light years away in the constellation Pegasus.

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