Difference between revisions 1514403 and 1514429 on enwikiversity

[[Image:Ice cap.jpg|thumb|right|200px|This is an aerial image of the ice cap on Ellesmere Island, Canada. Credit: National Snow and Ice Data Center.]]
'''Earth''' is rocky astronomical object, a liquid object, a gaseous object, and a plasma object.
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==Radiation astronomy==
{{main|Radiation astronomy}}
(contracted; show full){{main|Geochronology/Tephra layers|Tephra layers}}
[[Image:Ashfall from Pinatubo, 1991.jpg|thumb|right|200px|The volcanic eruption from Mount Pinatubo deposits a snowlike blanket of tephra on June 15, 1991. Credit: R.P. Hoblitt, USGS.]]
An ashfall occurs from a nearby volcano, before the locals can leave the area or maybe even go to work.
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==Aircraft==
{{main|Astronomy/Airborne|Airborne astronomy}}

[[Image:446826main ED10-0080-03c 946-710.jpg|thumb|right|200px|The SOFIA observatory is flying with 100% open telescope door. Credit: NASA.]]
The "Stratospheric Observatory for Infrared Astronomy [(SOFIA) is] mounted onboard a Boeing 747SP. [...] SOFIA’s 2.7 m mirror and optimized telescope system combines the highest available spatial resolution with excellent sensitivity. SOFIA will operate in both celestial hemispheres for the next two decades."<ref name=Krabbe>{{ cite book
| author=Alfred Krabbe
| title=SOFIA telescope, In: ‘’Proceedings of SPIE: Astronomical Telescopes and Instrumentation’’
| pages=276–281
| date=March, 2007
| publisher=SPIE — The International Society for Optical Engineering
| location=Munich, Germany
|url=http://arxiv.org/pdf/astro-ph/0004253v1.pdf
| arxiv=astro-ph/0004253 }}</ref>

It has an operating altitude of 12-14 km, 39,000-45,000 ft and a spatial resolution of 1-3" for 0.3 < λ < 15 µm, and λ/10" for λ > 15 µm.<ref name=Krabbe/> ⏎
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==Research==
{{main|Research}}

Hypothesis:
# Earth is a rocky object throughout most of its interior and exterior.

(contracted; show full)[[Category:Astronomy learning projects]]
[[Category:Planetary science]]
[[Category:Research]]
[[Category:Research projects]]
[[Category:Resources last modified in February 2016]]
{{experimental}}{{research}}{{article}}{{lecture}}{{astronomy}}

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