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Hubble Observes Atmospheres of TRAPPIST-1 Exoplanets in the Habitable Zone

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Astronomers using the Hubble Space Telescope have conducted the first spectroscopic survey of Earth-sized planets in the TRAPPIST-1 system’s habitable zone. Hubble reveals that at least the inner five planets do not seem to contain puffy, hydrogen-rich atmospheres similar to gaseous planets such as Neptune. This means the atmospheres may be more shallow and rich in heavier gases like carbon dioxide, methane, and oxygen. ... Read More | Share it now!

A Zoom to the Black Hole in M87

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A zoom into the giant elliptical galaxy Messier 87 (M87) from a wide field view of the entire galaxy to the supermassive black hole at its core. This series of nine images starts with visible light views, but quickly transitions to radio wavelengths. The final image from the Event Horizon Telescope has a resolution 2500 times better than the Hubble Space Telescope.... Read More | Share it now!

A Galaxy Grouping in 2D and 3D: Stephan’s Quintet

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In 1877, Edouard Stephan discovered a tight visual grouping of five galaxies located in the constellation Pegasus. The galaxies of Stephan’s Quintet are both overlapping and interacting, and have become the most famous among the compact groups of galaxies. Astronomers have long known that four of the galaxies (all of which are yellowish-white in this video) form a physical group in space, while the fifth (bluish) is a foreground galaxy. In addition, a sixth galaxy (yellowish-white and on the far left) is likely to be part of the physical grouping. Hence, this 2D quintet that is a 3D quartet may actually be a 2D sextet that is a 3D quintet. ... Read More | Share it now!