Kepler Update: Earth's 'Bigger and Older Cousin' Discovered Orbiting Distant Star

Artist’s conception of Kepler-452b, the first near-Earth-sized exoplanet discovered orbiting in the habitable zone of a Sun-like star. Image Credit: NASA Ames/JPL-Caltech/T. Pyle

One of the primary goals in the search for exoplanets is to, hopefully, find an Earth analog or “Earth twin,” an alien world similar to our own. That search is still […]

'Old Earths': The Search for Ancient and Habitable (But Dying) Exoplanets

Illustration depicting the life cycle of Sun-like stars. Billions of years from now, our own Sun will expand into a red giant star, scorching any life that exists. Image Credit: ESO/M. Kornmesser

Researchers at Cornell University are taking a new approach to the search for alien life: looking for habitable planets older than Earth, […]

Hubble Space Telescope Reveals Massive Groups of Star Clusters in Abell 1689

The Hubble Space Telescope has imaged what appears to be more than 160,000 star clusters in a group of galaxies known as Abell 1689. Image Credit: NASA, ESA, J. Blakeslee (NRC Herzberg Astrophysics Program, Dominion Astrophysical Observatory), and K. Alamo-Martinez (National Autonomous University of Mexico).

On a day which yielded another historic announcement about […]

Hubble Spies Massive Black Hole-Fueled Space Slinky

Video courtesy of NASA

In an effort to understand how black holes shape the evolution of galaxies, astronomers spent eight months creating a series of time-lapse movies from 400 observations made by NASA’s Hubble Space Telescope. The movies, taken from observations conducted over a 13-year period from 1995-2008, show a 5,000-mile-long jet […]

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 […]

IBEX Sees Our Solar System's 'Tail'

NASA’s IBEX spacecraft has detected the four-leaf-clover-shaped pattern of our Solar System’s “tail.” Image Credit: NASA

Three years of observations by NASA’s Interstellar Boundary Explorer (IBEX) have shown that the Solar System has a tail shaped like a four-leaf clover. The stream of particles that blows away from the Sun, known as […]

GALEX Retired After a Decade of Service to Space Science

The Andromeda galaxy, M31, observed by the now-retired ultraviolet space telescope GALEX. This composite image is false-colored, with blue representing far ultraviolet and orange representing near ultraviolet. Image Credit: NASA/JPL – Caltech.

GALEX, the Galaxy Evolution Explorer, was recently decommissioned by NASA after more than 10 years of operation. GALEX was a space telescope with […]

Another Look at Fermi’s Paradox

If intelligent alien life is so abundant, then where is it? Image Credit: NASA / HST

Enrico Fermi was a theoretical and experimental physicist known for his work on the first nuclear reactor and his contributions to quantum theory, particle physics, and statistical mechanics. He won the Nobel Prize in 1938 and was widely […]

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 […]

Chandra X-Ray Observatory Reveals 'Black Hole Bonanza' in Andromeda Galaxy

Data from Chandra’s X-ray Observatory has led astronomers to unveil 26 black holes in the Milky Way’s neighbor, the Andromeda Galaxy. This is the largest number of black hole candidates found in a galaxy outside our own. Image Credit: X-ray: NASA/CXC/SAO/R. Barnard, Z. Lee et al.; Optical: NOAO/AURA/NSF/REU Program/B. Schoening, V. Harvey and Descubre […]