Hubble measures tenth planet
April 11th, 2006
For the first time, NASA’s Hubble Space Telescope has seen distinctly the “tenth planet,” currently nicknamed “Xena,” and found that it’s only slightly larger than Pluto.
Though previous ground-based observations suggested that Xena’s diameter was about 30 percent greater than Pluto, Hubble observations taken Dec. 9 and 10, 2005, showed Xena’s diameter as 1,490 miles (with an uncertainty of 60 miles).
Pluto’s diameter, as measured by Hubble, is 1,422 miles.
credit: NASA
January 4th, 2008 at 12:07 pm
someone says that the 10th planet is bigger than jupiter, What’s the truth?