Astronomy Picture of the Day [1]Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2019 November 11 [2]See Explanation. Clicking on the picture will download the highest resolution version available. Lunar Craters Langrenus and Petavius Image Credit & Copyright: [3]Eduardo Schaberger Poupeau Explanation: The history of the Moon is partly written in its craters. Pictured here is a lunar panorama taken from Earth featuring the large craters [4]Langrenus, toward the left, and [5]Petavius, toward the right. The craters formed in separate [6]impacts. [7]Langrenus spans about 130 km, has a terraced rim, and sports a central peak rising about 3 km. [8]Petavius is slightly larger with a 180 km diameter and has a distinctive fracture that runs out from its center. Although it is known that Petravius crater is about 3.9 [9]billion years old, the origin of its large [10]fracture is unknown. The craters are best visible a few days after a [11]new Moon, when [12]shadows most greatly accentuate vertical walls and hills. The [13]featured image is a composite of the [14]best of [15]thousands of high-resolution, [16]infrared, video images taken through a small telescope. Although mountains on [17]Earth will likely erode into soil over a billion years, [18]lunar craters Langrenus and Petavius will likely survive many billions more years, possibly until the Sun expands and [19]engulfs both the [20]Earth and [21]Moon. Watch: the November 11 Transit of Mercury [22]from Earth or [23]from Space. Tomorrow's picture: spiraling sideways __________________________________________________________________ [24]< | [25]Archive | [26]Submissions | [27]Index | [28]Search | [29]Calendar | [30]RSS | [31]Education | [32]About APOD | [33]Discuss | [34]> __________________________________________________________________ Authors & editors: [35]Robert Nemiroff ([36]MTU) & [37]Jerry Bonnell ([38]UMCP) NASA Official: Phillip Newman [39]Specific rights apply. [40]NASA Web Privacy Policy and Important Notices A service of: [41]ASD at [42]NASA / [43]GSFC & [44]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/1911/PetaviusLangrenus_Poupeau_3000.jpg 3. https://www.facebook.com/astrofotografiarafaela/ 4. https://en.wikipedia.org/wiki/Langrenus_(crater) 5. https://en.wikipedia.org/wiki/Petavius_(crater) 6. https://apod.nasa.gov/apod/ap010428.html 7. http://lroc.sese.asu.edu/posts/453 8. http://lunarnetworks.blogspot.com/2012/12/lroc-petavius.html 9. https://en.wikipedia.org/wiki/Lunar_geologic_timescale 10. https://moon.nasa.gov/resources/371/fractured-crater/ 11. https://spaceplace.nasa.gov/dr-marc-moon-phases/en/ 12. https://www.themadcatlady.com/wp-content/uploads/2012/10/SAM_1629.jpg 13. https://www.facebook.com/astrofotografiarafaela/photos/a.407916176064535/1072090396313773/?type=3&theater 14. https://en.wikipedia.org/wiki/Lucky_imaging 15. https://www.youtube.com/watch?v=488OSfvqIcM 16. https://science.nasa.gov/ems/07_infraredwaves 17. https://epod.usra.edu/ 18. https://www2.lpod.org/wiki/Main_Page 19. https://www.scientificamerican.com/article/the-sun-will-eventually-engulf-earth-maybe/ 20. https://solarsystem.nasa.gov/planets/earth/overview/ 21. https://solarsystem.nasa.gov/moons/earths-moon/overview/ 22. https://earthsky.org/tonight/transit-of-mercury-on-november-11-2019 23. http://sdoisgo.blogspot.com/2019/10/mercury-transit-november-11-2019.html 24. https://apod.nasa.gov/apod/ap191110.html 25. https://apod.nasa.gov/apod/archivepix.html 26. https://apod.nasa.gov/apod/lib/apsubmit2015.html 27. https://apod.nasa.gov/apod/lib/aptree.html 28. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 29. https://apod.nasa.gov/apod/calendar/allyears.html 30. https://apod.nasa.gov/apod.rss 31. https://apod.nasa.gov/apod/lib/edlinks.html 32. https://apod.nasa.gov/apod/lib/about_apod.html 33. http://asterisk.apod.com/discuss_apod.php?date=191111 34. https://apod.nasa.gov/apod/ap191112.html 35. http://www.phy.mtu.edu/faculty/Nemiroff.html 36. http://www.phy.mtu.edu/ 37. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 38. http://www.astro.umd.edu/ 39. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 40. https://www.nasa.gov/about/highlights/HP_Privacy.html 41. https://astrophysics.gsfc.nasa.gov/ 42. https://www.nasa.gov/ 43. https://www.nasa.gov/centers/goddard/ 44. http://www.mtu.edu/