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St. Paul, Minn.

Planet hunters step it up

Go Deeper.

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A computer-generated simulation of TrES-4
The planet's home star is bigger and hotter than the sun, and is about 10 times larger than the planet. The image shows how the new planet compares in size to Jupiter, at left.
Jeffrey Hall, Lowell Observatory
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1 of 2
A computer-generated simulation of TrES-4
The planet's home star is bigger and hotter than the sun, and is about 10 times larger than the planet. The image shows how the new planet compares in size to Jupiter, at left.
Jeffrey Hall, Lowell Observatory
2 of 2
New planets?
The International Astronomical Union proposed the addition of three more planets to the solar system.
Image courtesy the International Astronomical Union/Martin Kornmesser