These time-lapse images of a newfound dwarf planet in our solar system, formerly known as 2003 UB313 (or Xena), and now called Eris, were taken using the Samuel Oschin Telescope at the Palomar Observatory.
Newest Member of Our Solar System (Artist's Concept)
This artist's concept shows the planet catalogued as 2003UB313 at the lonely outer fringes of our solar system. Our Sun can be seen in the distance. The new planet is at least as big as Pluto and about three times farther away from the Sun than Pluto.