Mercury and Me: An Intimate Memoir by the Man Freddie Loved

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Mercury and Me: An Intimate Memoir by the Man Freddie Loved

Mercury and Me: An Intimate Memoir by the Man Freddie Loved

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Seeds, Michael A. (2004). Astronomy: The Solar System and Beyond (4thed.). Brooks Cole. ISBN 978-0-534-42111-3. Liu, Han-Shou; O'Keefe, John A. (1965). "Theory of Rotation for the Planet Mercury". Science. 150 (3704): 1717. Bibcode: 1965Sci...150.1717L. doi: 10.1126/science.150.3704.1717. PMID 17768871. S2CID 45608770. Gilvarry, John J. (1953). "Relativity Precession of the Asteroid Icarus". Physical Review. 89 (5): 1046. Bibcode: 1953PhRv...89.1046G. doi: 10.1103/PhysRev.89.1046. a b Cameron, Alastair G. W. (1985). "The partial volatilization of Mercury". Icarus. 64 (2): 285–294. Bibcode: 1985Icar...64..285C. doi: 10.1016/0019-1035(85)90091-0. The first spacecraft to visit Mercury was NASA's Mariner 10 (1974–1975). [22] The spacecraft used the gravity of Venus to adjust its orbital velocity so that it could approach Mercury, making it both the first spacecraft to use this gravitational "slingshot" effect and the first NASA mission to visit multiple planets. [190] Mariner 10 provided the first close-up images of Mercury's surface, which immediately showed its heavily cratered nature, and revealed many other types of geological features, such as the giant scarps that were later ascribed to the effect of the planet shrinking slightly as its iron core cools. [191] Unfortunately, the same face of the planet was lit at each of Mariner 10 's close approaches. This made close observation of both sides of the planet impossible, [192] and resulted in the mapping of less than 45% of the planet's surface. [193]

The largest known crater is Caloris Planitia, or Caloris Basin, with a diameter of 1,550km (960mi). [64] The impact that created the Caloris Basin was so powerful that it caused lava eruptions and left a concentric mountainous ring ~2km (1.2mi) tall surrounding the impact crater. The floor of the Caloris Basin is filled by a geologically distinct flat plain, broken up by ridges and fractures in a roughly polygonal pattern. It is not clear whether they were volcanic lava flows induced by the impact or a large sheet of impact melt. [62] Mercury's orbit is inclined by 7 degrees to the plane of Earth's orbit (the ecliptic), the largest of all eight known solar planets. [111] As a result, transits of Mercury across the face of the Sun can only occur when the planet is crossing the plane of the ecliptic at the time it lies between Earth and the Sun, which is in May or November. This occurs about every seven years on average. [112] Milbrath, Susan (1999). Star Gods of the Maya: Astronomy in Art, Folklore and Calendars. University of Texas Press. ISBN 978-0-292-75226-9.

a b Colombo, Giuseppe; Shapiro, Irwin I. (November 1965). "The Rotation of the Planet Mercury". SAO Special Report #188R. 188: 188. Bibcode: 1965SAOSR.188.....C. Mercury is best observed at the first and last quarter, although they are phases of lesser brightness. The first and last quarter phases occur at greatest elongation east and west of the Sun, respectively. At both of these times, Mercury's separation from the Sun ranges anywhere from 17.9° at perihelion to 27.8° at aphelion. [143] [146] At greatest western elongation, Mercury rises at its earliest before sunrise, and at greatest eastern elongation, it sets at its latest after sunset. [147] False-color image of Carnegie Rupes, a tectonic landform—high terrain (red); low (blue). Mercury is the first planet from the Sun and the smallest in the Solar System. It is a terrestrial planet with a heavily cratered surface due to overlapping impact events. These features are well preserved since the planet has no geological activity and an extremely tenuous atmosphere called an exosphere. Despite being the smallest planet in the Solar System with a mean diameter of 4,880km (3,030mi), 38% of that of Earth, Mercury is dense enough to have roughly the same surface gravity as Mars. Mercury has a dynamic magnetic field with a strength about 1% of that of Earth's and has no natural satellites. It is important to be clear about the meaning of "closeness". In the astronomical literature, the term "closest planets" often means "the two planets that approach each other most closely". In other words, the orbits of the two planets approach each other most closely. However, this does not mean that the two planets are closest over time. For example, essentially because Mercury is closer to the Sun than Venus, Mercury spends more time in proximity to Earth; it could, therefore, be said that Mercury is the planet that is "closest to Earth when averaged over time". However, using this time-average definition of 'closeness'—as noted above—it turns out that Mercury is the closest planet to all other planets in the solar system. For that reason, arguably, the proximity-definition is not particularly helpful. An episode of the BBC Radio 4 programme "More or Less" explains the different notions of proximity well. [121]

Wieczorek, Mark A.; Zuber, Maria T. (2001). "A Serenitatis origin for the Imbrian grooves and South Pole-Aitken thorium anomaly". Journal of Geophysical Research. 106 (E11): 27853–27864. Bibcode: 2001JGR...10627853W. doi: 10.1029/2000JE001384 . Retrieved May 12, 2008. Gold, Lauren (May 3, 2007). "Mercury has molten core, Cornell researcher shows". Chronicle. Cornell University . Retrieved May 12, 2008. Names for features on Mercury come from a variety of sources and are set according to the IAU planetary nomenclature system. Names coming from people are limited to the deceased. Craters are named for artists, musicians, painters, and authors who have made outstanding or fundamental contributions to their field. Ridges, or dorsa, are named for scientists who have contributed to the study of Mercury. Depressions or fossae are named for works of architecture. Montes are named for the word "hot" in a variety of languages. Plains or planitiae are named for Mercury in various languages. Escarpments or rupēs are named for ships of scientific expeditions. Valleys or valles are named for abandoned cities, towns, or settlements of antiquity. [56] Impact basins and craters Enhanced-color image of craters Munch (left), Sander (center), and Poe (right) amid volcanic plains (orange) near Caloris Basin

Venus is not Earth's closest neighbor". Physics Today. AIP Publishing. March 12, 2019. doi: 10.1063/pt.6.3.20190312a. ISSN 1945-0699. S2CID 241077611. The resort has a variety of accommodation options, with 99 overwater rooms and 10 beachfront rooms. Guests can choose the type of room that best suits their preferences and enjoy stunning views of the surrounding coral gardens and marine life. Instrument Shows What Planet Mercury Is Made Of". University of Michigan. June 30, 2008 . Retrieved May 18, 2009. Nittler, Larry R.; Weider, Shoshana Z. (2019). "The Surface Composition of Mercury". Elements. 15 (1): 33–38. Bibcode: 2019Eleme..15...33N. doi: 10.2138/gselements.15.1.33. S2CID 135051680.



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