Astrochemistry

Stellar Parameters and Chemical Abundances of 223 Evolved Stars With and Without Planets

Stellar Parameters and Chemical Abundances of 223 Evolved Stars With and Without Planets

We present fundamental stellar parameters and chemical abundances for a sample of 86 evolved stars with planets and for a control sample of 137 stars without planets.

Habitable Zones & Global Climate

From Sub-Neptunes to Super-Earths: The Search for Habitable Worlds

From Sub-Neptunes to Super-Earths: The Search for Habitable Worlds

During a live Google Hangout, three astrophysicists -- Zachory Berta-Thompson, Bruce Macintosh and Marie-Eve Naud -- discussed the huge variety of planets discovered so far, how close we are to being able to see other Earth-like planets, and all that remains unknown.

Planetary Protection

Planetary Protection and ExoMars Payload Integration

Planetary Protection and ExoMars Payload Integration

Like surgeons in an operating room, the technicians work gowned and masked in ESA's ultraclean microbiology laboratory, ensuring a high-tech sensor will not contaminate the Red Planet with terrestrial microbes.

Titan

NASA-led Study Sees Titan Glowing at Dusk and Dawn

NASA-led Study Sees Titan Glowing at Dusk and Dawn

New maps of Saturn's moon Titan reveal large patches of trace gases shining brightly near the north and south poles.

Titan

Ethyl Cyanide on Titan: Spectroscopic Detection and Mapping Using ALMA

Ethyl Cyanide on Titan: Spectroscopic Detection and Mapping Using ALMA

We report the first spectroscopic detection of ethyl cyanide (C2H5CN) in Titan's atmosphere, obtained using spectrally and spatially resolved observations of multiple emission lines with the Atacama Large Millimeter/submillimeter array (ALMA).

Origin & Evolution of Life

Scientists Create Possible Precursor to Life

Scientists Create Possible Precursor to Life

How did life originate? And can scientists create life? These questions not only occupy the minds of scientists interested in the origin of life, but also researchers working with technology of the future.

Extrasolar Planets

Accretion and Differentiation of the Terrestrial Planets

Accretion and Differentiation of the Terrestrial Planets

In order to test planetary accretion and differentiation scenarios, we integrated a multistage core-mantle differentiation model with N-body accretion simulations.

Extrasolar Planets

Hubble Maps Temperature and Water Vapor on an Exoplanet

Hubble Maps Temperature and Water Vapor on an Exoplanet Video in Story

A team of scientists using NASA's Hubble Space Telescope has made the most detailed global map yet of the glow from a planet orbiting another star, revealing secrets of air temperatures and water.

Mars

The Search for the Fingerprints of Life on Mars Begins

The Search for the Fingerprints of Life on Mars Begins

NASA's Astrobiology Institute (NAI) announced that the SETI Institute has been selected as a new member of theNAI for a 5-year research program, "Changing Planetary Environments and the Fingerprints of Life."

Extrasolar Planets

Formation of Close in Super-Earths and Mini-Neptunes

Formation of Close in Super-Earths and Mini-Neptunes

Recent observations by the Kepler space telescope have led to the discovery of more than 4000 exoplanet candidates consisting of many systems with Earth- to Neptune-sized objects that reside well inside the orbit of Mercury, around their respective host stars.

Astrobiology (general)

NASA Selects New Science Teams for Astrobiology Research

NASA Selects New Science Teams for Astrobiology Research

NASA has awarded five-year grants totaling almost $50 million to seven research teams nationwide to study the origins, evolution, distribution, and future of life in the universe.

More top stories from October.