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The minimum angular separation would be less than 1′, and occasionally the Moon would be seen to [[astronomical transit|transit]] in front of or pass behind (be occulted by) the Earth. The former case would correspond to a lunar [[occultation]] of Mars as seen from Earth, and because the Moon's [[albedo]] is considerably less than that of the Earth, a dip in overall brightness would occur, although this would be too small to be noticeable by casual naked eye observers because the size of the Moon is much smaller than that of the Earth and it would cover only a small fraction of the Earth's disk. |
The minimum angular separation would be less than 1′, and occasionally the Moon would be seen to [[astronomical transit|transit]] in front of or pass behind (be occulted by) the Earth. The former case would correspond to a lunar [[occultation]] of Mars as seen from Earth, and because the Moon's [[albedo]] is considerably less than that of the Earth, a dip in overall brightness would occur, although this would be too small to be noticeable by casual naked eye observers because the size of the Moon is much smaller than that of the Earth and it would cover only a small fraction of the Earth's disk. |
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[[Mars Global Surveyor]] imaged the Earth and Moon on May 8, 2003 |
[[Mars Global Surveyor]] imaged the Earth and Moon on May 8, 2003 13:00 UTC, very close to maximum angular [[Elongation (astronomy)|elongation]] from the [[Sun]] and at a distance of 0.930 AU from Mars. The [[apparent magnitude]]s were given as −2.5 and +0.9.<ref>{{Cite web |url=http://www.msss.com/mars_images/moc/2003/05/22/ |title=Mars Global Surveyor MOC2-368 Release |access-date=2005-04-23 |archive-url=https://web.archive.org/web/20110916100858/http://www.msss.com/mars_images/moc/2003/05/22/ |archive-date=2011-09-16 |url-status=dead }}</ref> At different times the actual magnitudes will vary considerably depending on distance and the phases of the Earth and Moon. |
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From one day to the next, the view of the Moon would change considerably for an observer on Mars than for an observer on Earth. The [[lunar phase|phase of the Moon]] as seen from Mars would not change much from day to day; it would match the phase of the Earth, and would only gradually change as both Earth and Moon move in their orbits around the Sun. On the other hand, an observer on Mars would see the Moon rotate, with the same period as its orbital period, and would see far side features that can never be seen from Earth. |
From one day to the next, the view of the Moon would change considerably for an observer on Mars than for an observer on Earth. The [[lunar phase|phase of the Moon]] as seen from Mars would not change much from day to day; it would match the phase of the Earth, and would only gradually change as both Earth and Moon move in their orbits around the Sun. On the other hand, an observer on Mars would see the Moon rotate, with the same period as its orbital period, and would see far side features that can never be seen from Earth. |
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Since Mars has an atmosphere that is relatively transparent at optical wavelengths (just like Earth, albeit much thinner), [[meteor]]s will occasionally be seen. [[Meteor shower]]s on Earth occur when the Earth intersects the orbit of a [[comet]], and likewise, Mars also has meteor showers, although these are different from the ones on Earth. |
Since Mars has an atmosphere that is relatively transparent at optical wavelengths (just like Earth, albeit much thinner), [[meteor]]s will occasionally be seen. [[Meteor shower]]s on Earth occur when the Earth intersects the orbit of a [[comet]], and likewise, Mars also has meteor showers, although these are different from the ones on Earth. |
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[[File:NASA-14090-Comet-C2013A1-SidingSpring-Hubble-20140311.jpg|thumb|left|200px|[[C/2013 A1|Comet Siding Spring]] as seen by [[Hubble Space Telescope|Hubble]] on 11 March 2014.]] |
[[File:NASA-14090-Comet-C2013A1-SidingSpring-Hubble-20140311.jpg|thumb|left|200px|[[C/2013 A1|Comet Siding Spring]] as seen by [[Hubble Space Telescope|Hubble]] on 11 March 2014.]] |
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The first meteor photographed on Mars (on March 7, 2004 |
The first meteor photographed on Mars (on March 7, 2004 by the ''[[Spirit (rover)|Spirit]]'' rover) is now believed to have been part of a meteor shower whose parent body was comet [[114P/Wiseman-Skiff]]. Because the radiant was in the constellation [[Cepheus (constellation)|Cepheus]], this meteor shower could be dubbed the Martian Cepheids.<ref>{{cite web |url=https://www.researchgate.net/publication/7811359 |title = Extraterrestrial meteors: A martian meteor and its parent comet}}</ref> |
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As on Earth, when a meteor is large enough to actually impact with the surface (without burning up completely in the atmosphere), it becomes a [[meteorite]]. The first known meteorite discovered on Mars (and the third known meteorite found someplace other than Earth) was [[Heat Shield Rock]]. The first and the second ones were found on the Moon by the [[Apollo program|Apollo missions]].<ref name=joy>{{cite conference |url=https://www.hou.usra.edu/meetings/metsoc2013/pdf/5315.pdf |title=Bench Crater meteorite: Hydrated Asteroid Material Delivered to the Moon |last1=Joy |first1=K.H |author-link1 = Katherine Joy|last2=Messenger |first2=S|last3=Zolensky |first3=M.E |last4=Frank |first4=D.R| last5=Kring |first5=D.A|date=2013|conference=76th Annual Meteoritical Society Meeting }}</ref><ref name=metbuldb>{{Cite web|url=http://www.lpi.usra.edu/meteor/index.php?code=11469|title=Meteoritical Bulletin Database: ''Hadley Rille''}}</ref> |
As on Earth, when a meteor is large enough to actually impact with the surface (without burning up completely in the atmosphere), it becomes a [[meteorite]]. The first known meteorite discovered on Mars (and the third known meteorite found someplace other than Earth) was [[Heat Shield Rock]]. The first and the second ones were found on the Moon by the [[Apollo program|Apollo missions]].<ref name=joy>{{cite conference |url=https://www.hou.usra.edu/meetings/metsoc2013/pdf/5315.pdf |title=Bench Crater meteorite: Hydrated Asteroid Material Delivered to the Moon |last1=Joy |first1=K.H |author-link1 = Katherine Joy|last2=Messenger |first2=S|last3=Zolensky |first3=M.E |last4=Frank |first4=D.R| last5=Kring |first5=D.A|date=2013|conference=76th Annual Meteoritical Society Meeting }}</ref><ref name=metbuldb>{{Cite web|url=http://www.lpi.usra.edu/meteor/index.php?code=11469|title=Meteoritical Bulletin Database: ''Hadley Rille''}}</ref> |
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Copy and paste: – — ° ′ ″ ≈ ≠ ≤ ≥ ± − × ÷ ← → · § Cite your sources: <ref></ref>
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Greek: Ά ά Έ έ Ή ή Ί ί Ό ό Ύ ύ Ώ ώ Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ Σ σ ς Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω {{Polytonic|}}
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