Terrestrial planet

May 17, 2018

Who’s Out There?—Anyone of Interest?

Two articles in Science News April 28 and May 12, 2018, focus on what we have learned about the 5000 possible exoplanets Kepler has found. Now we await […]
July 15, 2017

Who’s Out There?—Problems Getting Started

Since wet chemists on Earth have not reinvented life from scratch—not one self-reproducing living critter, nor even a self-serving prion–we can probably assume that it’s not […]
June 22, 2017

Is It Time to Rethink How We Search for Alien Life?

WASHINGTON — From the lovable, candy-munching E.T. to the deadly Xenomorphs from the “Alien” movies, science-fiction stories are bursting with all kinds of alien encounters. But […]
May 25, 2017

TRAPPIST-1h Orbit Suggests It Is Too Cold for Life

Scientists have confirmed that all seven planets in the TRAPPIST-1 system circle their star in a sort of gravitational lockstep with one another. The orbits of […]
May 17, 2017

‘Styrofoam’ Planet Discovery Will Help Us Find Habitable Planets and Alien Life

KELT-11b will help astronomers develop the best tools for assessing habitability or possible life on distant exoplanets. Since the largest exoplanets are the easiest to spot […]
May 13, 2017

Mars May Have Been Born in the Asteroid Belt

Research suggests that gravitational interactions forced Mars out of the asteroid belt and toward the sun about 120 million years after the birth of the solar […]
May 6, 2017

TRAPPIST-1 Planets Have No Large Moons, Study Argues

The conditions for habitable exoplanets in the TRAPPIST-1 system might depend on the presence of large moons — and Earth reveals clues to why. While we […]
February 25, 2017

The Search for Life in the Universe Just Got a Lot More Interesting

Discovering several Earth-size planets around TRAPPIST-1 means the likelihood of finding life within the habitable zones of other star systems could be much greater than previously […]
February 23, 2017

NASA discovers solar system with seven Earth-like planets, three of them in the star’s habitable zone

For the first time ever, astronomers have discovered seven Earth-size planets orbiting a nearby star — and these new worlds could hold life. This cluster of […]