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Hubble’s compact galaxy with big-time star formation

16 October 2017 Astronomy Now

As far as galaxies are concerned, size can be deceptive. Some of the largest galaxies in the Universe are dormant, while some dwarf galaxies, such as ESO 553-46 imaged here by the NASA/ESA Hubble Space Telescope, can produce stars at a hair-raising rate.

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Enceladus’ phantom limb

4 October 2017 Astronomy Now

The brightly lit limb of a crescent Enceladus looks ethereal against the blackness of space. The rest of the moon, lit by light reflected from Saturn, presents a ghostly appearance.

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Moon’s-eye view of total solar eclipse

30 August 2017 Astronomy Now

During the total solar eclipse on Aug. 21, the Lunar Reconnaissance Orbiter Camera captured an image of the Moon’s shadow over a large region of the United States, centered just north of Nashville, Tennessee.

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Saturn-lit moon

25 August 2017 Astronomy Now

NASA’s Cassini probe gazes across the icy rings of Saturn toward the icy moon Tethys, whose night side is illuminated by Saturnshine, or sunlight reflected by the planet.

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A very close encounter

15 August 2017 Astronomy Now

Back in October 2012, the near-Earth asteroid 2012 TC4 had a close encounter with Earth. It passed our planet at a distance only a quarter of that between the Earth and the Moon. In October 2017, this small asteroid, with a size of only about 15 to 30 metres, will return for another very close fly-by, making it the perfect object to test the asteroid detection and tracking network.

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Galactic David and Goliath

28 July 2017 Astronomy Now

The gravitational dance between two galaxies in our local neighbourhood has led to intriguing visual features in both as witnessed in this new NASA/ESA Hubble Space Telescope image. The tiny NGC 1510 and its colossal neighbour NGC 1512 are at the beginning of a lengthy merger, a crucial process in galaxy evolution.

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Haze on Saturn’s horizon

27 July 2017 Astronomy Now

This false-color view from NASA’s Cassini spacecraft gazes toward the rings beyond Saturn’s sunlit horizon. Along the limb at left can be seen a thin, detached haze. This haze vanishes toward the left side of the scene.

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Enceladus’ jets from afar

26 July 2017 Astronomy Now

Enceladus’ intriguing south-polar jets are viewed by the Cassini probe from afar, backlit by sunlight while the moon itself glows softly in reflected Saturn-shine.