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Science & Nature

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"Planet Mercury Even Weirder Than We Thought"- Topography of craters around Mercury’s North Pole. The largest is Caloris Basin... more than 900 miles across, formed around 4 billion years ago. By measuring the height of surface features on Mercury, MESSENGER was able to show that the floor of Caloris Basin expanded upward, rising higher than the crater’s rim. This suggests that an active interior on Mercury pushed the floor up... later in the planet’s history than previously thought possible.

The star cluster Cygnus OB2 contains more than 60 O-type stars and about a thousand B-type stars. Image Credit: NASA

Celestial Emissions - Eta Carina Nebula by strongmanmike2002. Glowing regions of gas in our galaxy are known as emission nebulae. Imaging these nebulae through filters that only allow the passage of very specific wavelengths of light produces this type of image.

NGC 3132: The Eight Burst Nebula Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA) It's the dim star, not the bright one, near the center of NGC 3132 that created this odd but beautiful planetary nebula. Nicknamed the Eight-Burst Nebula & the Southern Ring Nebula, the glowing gas originated in the outer layers of a star like r Sun. In this representative color picture, the hot blue pool of light seen surrounding this binary system is energized by the hot surface of the faint star.