4 Vesta | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-03-06

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/4_Vesta


00:01:45 1 History
00:01:54 1.1 Discovery
00:03:35 1.2 Name
00:06:16 1.3 Early measurements
00:08:49 2 Orbit
00:09:15 3 Rotation
00:10:09 4 Coordinate systems
00:10:41 5 Physical characteristics
00:12:25 6 Surface features
00:14:22 6.1 Rheasilvia and Veneneia craters
00:14:51 6.2 Other craters
00:17:04 6.2.1 "Snowman craters"
00:17:40 6.3 Troughs
00:18:12 6.4 Surface composition
00:19:29 6.5 Features associated with volatiles
00:20:26 7 Geology
00:21:33 7.1 Regolith
00:23:57 8 Fragments
00:24:45 9 Exploration
00:25:48 9.1 Observations from Earth orbit
00:29:38 9.2 Observations from iDawn/i
00:29:47 9.2.1 True-color images
00:30:02 10 Visibility
00:30:25 10.1 2010–2011
00:31:33 10.2 2012–2013
00:32:18 10.3 2014
00:33:05 11 See also
00:33:22 12 Notes



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Voice name: en-AU-Wavenet-D


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SUMMARY
=======
Vesta (minor-planet designation: 4 Vesta) is one of the largest objects in the asteroid belt, with a mean diameter of 525 kilometres (326 mi). It was discovered by the German astronomer Heinrich Wilhelm Olbers on 29 March 1807 and is named after Vesta, the virgin goddess of home and hearth from Roman mythology.
Vesta is the second-most-massive and second-largest body in the asteroid belt, after the dwarf planet Ceres, and it contributes an estimated 9% of the mass of the asteroid belt.
It is slightly larger than Pallas, though significantly more massive. Vesta is the only known remaining rocky protoplanet (with a differentiated interior) of the kind that formed the terrestrial planets. Numerous fragments of Vesta were ejected by collisions one and two billion years ago that left two enormous craters occupying much of Vesta's southern hemisphere. Debris from these events has fallen to Earth as howardite–eucrite–diogenite (HED) meteorites, which have been a rich source of information about Vesta.Vesta is the brightest asteroid visible from Earth. Its maximum distance from the Sun is slightly greater than the minimum distance of Ceres from the Sun, though its orbit lies entirely within that of Ceres.NASA's Dawn spacecraft entered orbit around Vesta on 16 July 2011 for a one-year exploration and left orbit on 5 September 2012 en route to its final destination, Ceres. Researchers continue to examine data collected by Dawn for additional insights into the formation and history of Vesta.