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Arp 240: A Bridge between Spiral Galaxies from Hubble via NASA...

There is a difference between teaching about a subject and teaching the subject. Alchemy, astronomy, and creationism might be important to teach about in a humanities or history course, showing how far we've come in our intellectual history. -KK

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NGC 3314 is a pair of overlapping spiral galaxies between 117-140 million light years away in the constellation Hydra.

Aurora over Icelandic Fault | Admire the beauty but fear the beast. The beauty is the aurora overhead, here taking the form of great green spiral, seen between picturesque clouds with the bright Moon to the side and stars in the background. The beast is the wave of charged particles that creates the aurora but might, one day, impair civilization.

Have you ever wondered what’s the difference between a meteor and a meteorite or an asteroid, meteoroid or comet? Here are the answers to all your questions regarding Meteor Terminology by Vincent Perlerin for AMS.

Cassini probe captures Saturn's spectacular aurora. Generally, images of the aurora (equivalent to Earth's‘northern lights’) provide valuable information about the electromagnetic connection between the solar wind, the planet’s magnetic field (magnetosphere) and its upper atmosphere. The Daily Galaxy via Cassini/NASA.