路透美国佛州卡纳维拉尔角10月30日（记者 Irene Klotz） -科学家首次发现太阳系外存在不但大小与地球类似，而且铁石构成与地球也别无二致的类地行星。这是人类在探索另一个宜居世界的道路上迈出的重要一步。 这颗被命名为Kepler-78b的行星围绕天鹅座中一颗比 ...

The number of confirmed exoplanets, or worlds orbiting distant suns, shot past 1,000 last week, according to the semi-official Extrasolar Planets Encyclopedia. That’s pretty heady stuff considering ...

CAPE CANAVERAL, Fla. - For the first time, scientists have found a planet beyond the solar system that not only is the same size as Earth, but has the same proportions of iron and rock, a key step in ...

This illustration compares our Earth with the newly confirmed lava planet Kepler-78b. Kepler-78b is about 20 percent larger than Earth, with a diameter of 9,200 miles, and weighs roughly 1.8 times as ...

CAPE CANAVERAL, Fla. — Scientists have found a planet way out in the cosmos that’s close in size and content to Earth — an astronomical first. But hold off on the travel plans. This rocky world is so ...

Scientists this week announced the discovery of a new planet, roughly 400 lightyears away, that they are calling Kepler 78b. Kepler is rare in that it contains similar features to that of the planet ...

A team of astronomers has found the first Earth-sized planet outside the solar system that has a rocky composition like that of Earth. This exoplanet, known as Kepler-78b, orbits its star very closely ...

Researchers from MIT have located a lava-filled world about 700 light-years away that’s 40 times closer to its star than Mercury is to our sun. It’s considered one of the shortest orbital periods ...

Fast and furious A team of astronomers has discovered an Earth-sized planet where it could be your birthday, Christmas and New Year's Eve every day. The planet, named Kepler 78b and discovered by NASA ...

This diagram illustrates the tight orbit of Kepler-78b, which orbits its star every 8.5 hours at a distance of less than a million miles. It is only 2.7 stellar radii from the center of the star, or 1 ...

A new analysis of data from NASA’s Kepler spacecraft increases the number of habitable exoplanets thought to exist in this galaxy. By Dennis Overbye After nine and a half years in orbit, 530,506 stars ...