'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, […]

Curiosity Rover Finds More Evidence for Possible Liquid Water Brines on Mars

The Rover Environmental Monitoring Station (REMS) on the Curiosity rover, used to make the brine calculations. Photo Credit: NASA/JPL-Caltech/MSSS

The search for liquid water on Mars is one that has been on-going for decades. It can’t exist for long on the surface, as it will quickly sublimate into the cold, thin atmosphere. Aquifers deep […]

Astronomers Detect Complex Organics Around Nearby Young Star; Produce Them in Simulated Conditions in the Lab

Artist’s impression of the protoplanetary disk surrounding the young star MWC 480. Astronomers using the Atacama Large Millimeter/submillimeter Array, or ALMA, have detected the complex organic molecule methyl cyanide in the outer reaches of the star’s protoplanetary disk, where comets are believed to form. This discovery suggests that complex organic chemistry and potentially the […]

Spirit Rover: More Evidence for Ancient Hot Springs on Mars

View from the Spirit rover looking toward Husband Hill on the right, with the lighter-toned Home Plate rock outcrop below that. Image Credit: NASA/JPL-Caltech

The Spirit rover may have finished its journey a long time ago, but there is still plenty of data to go through and analyze, and continued study of that data […]

Scientists Create Color-Based Catalog of Earthly Life Forms to Help Search for Alien Biology

A hypothetical rendering of colorful plant life on a habitable exoplanet. Although most such alien life, if it exists, found with this technique may be microscopic, it illustrates how analysis of color could help scientists learn more about the physical nature of alien biology. Image Credit: NASA/Caltech/Doug Cummings

With exoplanets now being discovered by […]

Cassini Finds Evidence for Hydrothermal Activity on Saturn's Moon Enceladus

Cutaway view depicting the interior of Enceladus. Water, salts, organics, and methane make their way from the hydrothermal vents on the ocean bottom to the surface through cracks in the icy crust, erupting as geysers. Image Credit: NASA/JPL

The deep oceans on Earth are teeming with life, despite the cold and darkness, thanks to […]

New Technique to Study Clouds on Exoplanets Developed by Researchers at MIT

Artist’s conception of clouds on Kepler-7b. Image Credit: NASA (edited by Jose-Luis Olivares/MIT)

While exoplanets are now being discovered by the thousands, it is still a painstaking process to determine any specific details about them, since they are so incredibly far away. However, astronomers have been devising new techniques to do just that, including […]

'Life Not As We Know It': New Research Shows How Exotic Biology May Be Possible on Titan

Illustration of methane rainfall and lake on Titan. New research suggests exotic forms of life could be possible in this alien environment. Image Credit: Mark Garlick (Space-art.co.uk)/APOD

The search for life elsewhere has long focused on what we are most familiar with on Earth—in other words, “life as we know it,” or organisms which […]

Scientists Debate How to Search for Life on Europa in New Mission

Jupiter’s ice-covered moon Europa hides a water ocean beneath its surface. A return mission is now planned to help search for evidence of life there. Photo Credit: NASA/JPL

Jupiter’s moon Europa, with its subsurface ocean, is considered by many to be the best place in the Solar System to search for extraterrestrial life. With NASA […]

Exploring an Alien Sea: NASA Designs Submarine to Send to Titan

Artist’s conception of the Titan Submarine Phase I Conceptual Design. Much like submarines on Earth, the sub would explore the depths of one of Titan’s methane/ethane seas. Image Credit: NASA

Who wouldn’t want to go explore an alien sea? It seems that NASA would certainly like to, and the agency has unveiled a new submarine […]