X-rays detected from the dark side of Venus

Venus and Mercury have been observed transiting the Sun many times over the past few centuries. When these planets are seen passing between the Sun and the Earth, opportunities exist for some great viewing, not to mention ...

Migrating exoplanets

Many known exoplanets orbit close to their host star, within one-tenth of an astronomical unit (one AU is the average distance of the Earth from the Sun). Since their orbital periods are therefore very short and their gravitational ...

Tagish Lake meteorite may have come from Kuiper belt

(Phys.org)—A trio of researchers is suggesting that a meteorite retrieved from the surface of a frozen lake in Canada may have come from the Kuiper belt—which if true, would be the first to be so identified. In their ...

Kepler watches stellar dancers in the Pleiades cluster

Like cosmic ballet dancers, the stars of the Pleiades cluster are spinning. But these celestial dancers are all twirling at different speeds. Astronomers have long wondered what determines the rotation rates of these stars.

X marks the spot at the center of the Milky Way galaxy

Two astronomers—with the help of Twitter—have uncovered the strongest evidence yet that an enormous X-shaped structure made of stars lies within the central bulge of the Milky Way Galaxy.

When it comes to brown dwarfs, 'how far?' is a key question

Brown dwarfs are sometimes called failed stars. They're stars' dim, low-mass siblings and they fade in brightness over time. They're fascinating to astronomers for a variety of reasons, but much about them remains unknown. ...

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