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Visualize a vast reservoir of icy comets on the outskirts of our solar system. That’s what Jan Oort did in 1950, and why the Oort Cloud bears his name.
Red rainbows happen when the sun is on the horizon. They’re created in much the same process that causes a sunset or sunrise to look red.
This Hubble Space Telescope image reveals the first moon ever discovered around little Makemake, in the outermost region of our solar system.
Results from the Venus Express spacecraft, obtained when – in the craft’s final months – it surfed the dense atmosphere of Venus.
Iron-60 found in moon rocks supports an earlier finding that – 2 million years ago – a supernova exploded only 300 light-years away.
The Crab Nebula, located some 6,500 light years from Earth, marks the remains of a massive star observed to explode as a supernova in AD 1054.
In celebration of Earth Day 2016, we’ve brought together some of our favorite images of Earth by the EarthSky community. Thank you all!
A collection of 10 unexpected and intriguing facts about our solar system – our sun and its family of planets – you probably did not know!
Populations of the charismatic orange and black monarch butterfly have plummeted. Will they be extinct in 20 years?
No, there won’t be a green moon on April 20, 2016 … or on May 29. Some possible origins of this latest urban legend.
Moon and star Regulus before dawn
Meteor over Hidden Lake, Montana