﻿ 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. 2022 February 1 IFRAME: [2]https://www.youtube.com/embed/c4Xky6tlFyY?rel=0&VQ=HD720 Moon Phases 2022 Video Credit: Data: [3]Lunar Reconnaissance Orbiter ; Animation: [4]NASA's [5]Scientific Visualization Studio; Music: Build the Future ([6]Universal Production Music), [7]Alexander Hitchens Explanation: What will the Moon phase be on your birthday this year? It is [8]hard to predict because the [9]Moon's appearance changes nightly. As the [10]Moon orbits the [11]Earth, the half illuminated by the [12]Sun first becomes increasingly visible, then decreasingly visible. The [13]featured video animates images and altitude data taken by NASA's Moon-orbiting [14]Lunar Reconnaissance Orbiter to show all 12 lunations that appear this year, 2022 -- as seen from Earth's northern ([15]southern) hemisphere. A single [16]lunation describes one full cycle of our Moon, including all of its [17]phases. A full [18]lunation takes about 29.5 days, just under a month ([19]moon-th). As each [20]lunation progresses, sunlight reflects from the [21]Moon at different angles, and so [22]illuminates different features differently. During all of this, of course, the [23]Moon always keeps the same face toward the [24]Earth. What is less apparent night-to-night is that the [25]Moon's apparent size changes slightly, and that a slight wobble called a [26]libration occurs as the [27]Moon progresses along its [28]elliptical orbit. Tomorrow's picture: to circle a dying star __________________________________________________________________ [29]< | [30]Archive | [31]Submissions | [32]Index | [33]Search | [34]Calendar | [35]RSS | [36]Education | [37]About APOD | [38]Discuss | [39]> __________________________________________________________________ Authors & editors: [40]Robert Nemiroff ([41]MTU) & [42]Jerry Bonnell ([43]UMCP) NASA Official: Phillip Newman [44]Specific rights apply. [45]NASA Web Privacy Policy and Important Notices A service of: [46]ASD at [47]NASA / [48]GSFC & [49]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://www.youtube.com/embed/c4Xky6tlFyY?rel=0&VQ=HD720 3. https://lunar.gsfc.nasa.gov/ 4. https://www.nasa.gov/ 5. https://svs.gsfc.nasa.gov/ 6. https://www.universalproductionmusic.com/ 7. https://www.universalproductionmusic.com/en-us/discover/composers/18423/alexander-hitchens 8. https://vcahospitals.com/-/media/vca/images/lifelearn-images-foldered/10812/cognition2.jpg?la=en&hash=69D0BDA985281F5E7A93F87A8B783C90 9. https://apod.nasa.gov/apod/ap160201.html 10. https://solarsystem.nasa.gov/moons/earths-moon/overview/ 11. https://apod.nasa.gov/apod/ap070325.html 12. https://en.wikipedia.org/wiki/Sun 13. https://svs.gsfc.nasa.gov/4955 14. https://lunar.gsfc.nasa.gov/about.html 15. https://svs.gsfc.nasa.gov/4956 16. https://en.wikipedia.org/wiki/Lunation 17. https://spaceplace.nasa.gov/moon-phases/en/ 18. https://www.timeanddate.com/astronomy/moon/lunar-month.html 19. https://spaceplace.nasa.gov/moon-phases/en/ 20. https://scienceworld.wolfram.com/astronomy/Lunation.html 21. https://apod.nasa.gov/apod/moon.html 22. https://apod.nasa.gov/apod/ap180522.html 23. https://en.wikipedia.org/wiki/Moon 24. https://apod.nasa.gov/apod/ap210905.html 25. http://sten.astronomycafe.net/faqs/ 26. https://en.wikipedia.org/wiki/Libration 27. https://apod.nasa.gov/apod/ap180318.html 28. http://galileoandeinstein.phys.virginia.edu/more_stuff/Applets/Kepler/kepler.html 29. https://apod.nasa.gov/apod/ap220131.html 30. https://apod.nasa.gov/apod/archivepix.html 31. https://apod.nasa.gov/apod/lib/apsubmit2015.html 32. https://apod.nasa.gov/apod/lib/aptree.html 33. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 34. https://apod.nasa.gov/apod/calendar/allyears.html 35. https://apod.nasa.gov/apod.rss 36. https://apod.nasa.gov/apod/lib/edlinks.html 37. https://apod.nasa.gov/apod/lib/about_apod.html 38. http://asterisk.apod.com/discuss_apod.php?date=220201 39. https://apod.nasa.gov/apod/ap220202.html 40. http://www.phy.mtu.edu/faculty/Nemiroff.html 41. http://www.phy.mtu.edu/ 42. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 43. http://www.astro.umd.edu/ 44. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 45. https://www.nasa.gov/about/highlights/HP_Privacy.html 46. https://astrophysics.gsfc.nasa.gov/ 47. https://www.nasa.gov/ 48. https://www.nasa.gov/centers/goddard/ 49. http://www.mtu.edu/