New Neptune moon discovered


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This video is called Nasa’s Hubble telescope discovers new Neptune moon.

From the BBC:

15 July 2013 Last updated at 23:30 GMT

Nasa’s Hubble telescope discovers new Neptune moon

The Hubble space telescope has discovered a new moon orbiting Neptune, Nasa has confirmed.

Designated S/2004 N 1, this is the 14th known moon to circle the giant planet.

It also appears to be the smallest moon in the Neptunian system, measuring just 20 km (12 miles) across, completing one revolution around Neptune every 23 hours.

US astronomer Mark Showalter spotted the tiny dot while studying segments of rings around Neptune.

Nasa said the moon was roughly 100 million times dimmer than the faintest star visible to the naked eye.

It is so small that the Voyager spacecraft failed to spot it in 1989 when it passed close by Neptune and surveyed the planet’s system of moons and rings.

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