Difference between revisions 2249010 and 2301568 on enwikiversity

[[Image:Ice cap.jpg|thumb|right|250px|This is an aerial image of the ice cap on Ellesmere Island, Canada. Credit: National Snow and Ice Data Center.]]
'''Earth''' is a rocky astronomical object, a liquid object, a gaseous object, and a plasma object.
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==Astronomy==
{{main|Keynote lectures/Astronomy}}⏎
[[Image:Greenland 42.74746W 71.57394N.jpg|thumb|right|250px|Satellite composite image shows the ice sheet of Greenland. Credit: NASA.]]
At the right is a satellite composite image of the ice sheet over Greenland.
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==Radiation astronomy==
{{main|Radiation a/Astronomy}}
[[Image:Earth-moon.jpg|thumb|left|250px|This view of the rising Earth greeted the Apollo 8 astronauts as they came from behind the Moon after the lunar orbit insertion burn. Credit: NASA.]]
"Energetic photons, ions and electrons from the solar wind, together with galactic and extragalactic cosmic rays, constantly bombard surfaces of planets, planetary satellites, dust particles, comets and asteroids."<ref name=Madey>{{ cite journal
|author=Theodore E. Madey
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{{Radiation astronomy resources}}{{Sisterlinks|Earth}}

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[[Category:Astronomical objects/Lectures]]
[[Category:Earth/Lectures]]
[[Category:Planetary sciences/Lectures]]
[[Category:Radiation astronomy/Lectures]]