New Moon Discovered by Hubble Orbiting Third Largest Dwarf Planet in Kuiper Belt

Two images of dwarf planet 2007 OR10 from Hubble, taken a year apart, showing the small moon. Image Credit: NASA/ESA/C. Kiss (Konkoly Observatory)/J. Stansberry (STScI)

Moons are exceedingly common in the Solar System – Jupiter alone has 67! But smaller planets do as well of course, except for Mercury and Venus, and even some […]

NASA's WISE Finds Mysterious Centaurs May Be Comets

Image Credit: NASA/JPL-Caltech

The true identity of centaurs, the small celestial bodies orbiting the Sun between Jupiter and Neptune, is one of the enduring mysteries of astrophysics. Are they asteroids or comets? A new study of observations from NASA’s Wide-field Infrared Survey Explorer (WISE) finds most centaurs are comets.

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It's an Alien Blue World—But Nothing Like Earth

Artist’s conception of exoplanet HD 189733b—a “deep blue dot” reminiscent of Earth from a distance. Image Credit: NASA / ESA / M. Kornmesser

The planets and moons in our Solar System come in a wide variety of colors, and the natural beauty can be breathtaking. Now, the true color of a much more distant […]

NASA Announces Asteroid Grand Challenge

Image Credit: NASA

WASHINGTON — NASA announced Tuesday a Grand Challenge focused on finding all asteroid threats to human populations and knowing what to do about them.

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Hubble Space Telescope Reveals Evidence of Farthest Known Planet From Its Star

A gap in the protoplanetary disk of dust and gas whirling around TV Hydrae uncovered evidence of an unseen, growing planet, according to astronomers studying Hubble data. Image Credit: NASA, ESA, J. Debes (STScI), H. Jang-Condell (University of Wyoming), A. Weinberger (Carnegie Institution of Washington), A. Roberge (Goddard Space Flight Center), G. Schneider (University […]

New Members of Asteroid Families Discovered by WISE

An asteroid “family” is comprised of fragments of a parent body that was broken up during a collision. Image Credit: NASA / JPL / Caltech

NASA’s Wide-field Infrared Survey Explorer (WISE) has found new members of asteroid families. This was accomplished by reviewing millions of images collected during the asteroid-hunting part of the WISE […]

Hubble and Herschel Make Surprising Deep-Space Finds

The Ring Nebula, with its dying progenitor star clearly visible. Photo Credit: NASA

New data from the Hubble Space Telescope and the Herschel Space Observatory have provided new insights into the shape and structure of the far-off Ring Nebula—whose fate has important ramifications for the future of our own Sun—and may have begun the […]

NASA-Funded Asteroid Tracking Sensor Passes Key Test

Asteroid exploration has taken on renewed importance in recent years, with the close passage of 2012 DA14 in February 2013 drawing worldwide public attention. In addition to the proposed NEOCam telescope mission, NASA has announced plans for this Asteroid Retrieval Spacecraft, which may culminate in a mission as early as 2021 to bring a […]