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Ceres Displays Unexpected Flare-ups in Brightness to Ground-Based Survey

Bright reflective material in Ceres' Occator crater, imaged by NASA's Dawn spacecraft in Sept .2015. Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA.

Reflective material in Ceres’ 90-km-wide Occator crater, imaged by NASA’s Dawn spacecraft in Sept .2015. Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA.

Researchers using the High Accuracy Radial velocity Planet Searcher (HARPS) instrument on ESO’s 3.6-meter telescope at La Silla have detected “unexpected” changes in the brightness of Ceres during observations made in July and August of 2015. Variations in line with Ceres’ 9-hour rotational period were expected, but other fluctuations in brightness were also found that indicate albedo changes on a daily, diurnal basis.

Long story short: Ceres is slowly “blinking.”

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Earth-Sized Alien Planet Found Around the Stars Next Door

Artist’s impression of a planet discovered orbiting Alpha Centauri B, a member of the triple star system that is the closest to Earth. Our Sun is visible to the upper right. (ESO/L. Calçada)

These days it seems exoplanets are being discovered nearly every week, with “super-Earths”, “hot Jupiters” and “cold Neptunes” being identified (or at least announced as solid candidates) within star systems all around our neck of the galaxy. To top it all off, today the European Southern Observatory announced that an Earth-mass world has now been found orbiting Alpha Centauri B — quite literally the “star next door.”

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