Artist's concept of how large the rings of exoplanet J1407b would appear in our sky, if they were placed around Saturn. For comparison, notice the crescent moon on the right side of the image. Image via M. Kenworthy/Leiden University.
Photographic plates going back to 1890 are providing new clues as to whether a distant exoplanet has a giant ring system, more than 100 times wider than Saturn's. Read More.
The long, thin, white cloud has been seen extending west of a Martian volcano since September 13. It looks as if it could be volcanic, yet it isn't. Here's what's going on.
Airglow is the light of excited atoms high in Earth’s atmosphere. Earlier this month, Yuri Beletsky Nightscapes captured this image in Banff National Park in Alberta, Canada. Yuri said: “Here you can see a view of a river, with the prominent Big Dipper just above the mountains. Airglow waves were all over the sky!” Thank you. Yuri! Learn more about airglow.
