WebConcerning the lunar month of ~29.53 days as viewed from Earth, the lunar phase or Moon phase is the shape of the Moon's directly sunlit portion, which can be expressed quantitatively using areas or angles, or described qualitatively using the terminology of the 4 major phases: new moon, first quarter, full moon, last quarter and 4 minor phases: …

WebThere are several types of lunar month. The term lunar month usually refers to the synodic month because it is the cycle of the visible phases of the Moon.. Most of the following types of lunar month, except the distinction between the sidereal and tropical months, were first recognized in Babylonian lunar astronomy.. Sidereal month. The period of the Moon's …

WebA lunar eclipse occurs when the Moon moves into the Earth's shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned (in syzygy) with Earth between the other two, which can happen only on the night of a full moon when the Moon is near either lunar node.The type and length of a lunar eclipse depend on the Moon's …

WebThe Soviet crewed lunar programs were a series of programs pursued by the Soviet Union to land humans on the Moon, in competition with the United States Apollo program.The Soviet government publicly denied participating in such a competition, but secretly pursued two programs in the 1960s: crewed lunar flyby missions using Soyuz 7K …

WebA lunar calendar is a calendar based on the monthly cycles of the Moon's phases (synodic months, lunations), in contrast to solar calendars, whose annual cycles are based only directly on the solar year.The most commonly used calendar, the Gregorian calendar, is a solar calendar system that originally evolved out of a lunar calendar system.A purely …

WebThe Bell Aerosystems Lunar Landing Research Vehicle (LLRV, nicknamed the Flying Bedstead) was a Project Apollo era program to build a simulator for the Moon landings.The LLRVs were used by the FRC, now known as the NASA Armstrong Flight Research Center, at Edwards Air Force Base, California, to study and analyze piloting techniques needed …

WebA total lunar eclipse occurred on Tuesday, November 8, 2022. The southern limb of the Moon passed through the center of the Earth's shadow.It surpassed the previous eclipse as the longest total lunar eclipse visible from nearly all of North America since August 17, 1989, and until June 26, 2029. Occurring only 5.8 days before apogee (on November 14, 2022), …

WebA lunar day is the period of time for Earth's Moon to complete one rotation on its axis with respect to the Sun.Due to tidal locking, it is the time the Moon takes to complete one orbit around Earth (Earth rise to Earth set) plus about 2.2 more Earth days to return to the same Moon phase (due to the Moon's orbit around the Sun). The lunar day is roughly 29 1 / 2 …

WebThe Lunar Reconnaissance Orbiter (LRO) is a NASA robotic spacecraft currently orbiting the Moon in an eccentric polar mapping orbit. Data collected by LRO have been described as essential for planning NASA's future human and robotic missions to the Moon. Its detailed mapping program is identifying safe landing sites, locating potential resources on the …

WebA solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring Earth's view of the Sun, totally or partially.Such an alignment coincides with a new moon, indicating the Moon is closest to the plane of the Earth's orbit. In a total eclipse, the disk of the Sun is fully obscured by the Moon.In partial and annular eclipses, only part of …

WebThe Apollo Applications Program (AAP) was created as early as 1966 by NASA headquarters to develop science-based human spaceflight missions using hardware developed for the Apollo program.AAP was the ultimate development of a number of official and unofficial Apollo follow-on projects studied at various NASA labs. However, the AAP's …

WebCSS Baltic was a casemate ironclad that served in the Confederate States Navy during the American Civil War.A towboat and cotton lighter before the war, she was purchased by the state of Alabama in December 1861 for conversion into an ironclad. After being transferred to the Confederate Navy in May 1862, she served on Mobile Bay off the Gulf of Mexico. ...

WebIn astronomy, the new moon is the first lunar phase, when the Moon and Sun have the same ecliptic longitude. At this phase, the lunar disk is not visible to the naked eye, except when it is silhouetted against the Sun during a solar eclipse.. The original meaning of the term 'new moon', which is still sometimes used in calendrical, non-astronomical contexts, …

WebThe lunar terminator is the division between the illuminated and dark hemispheres of the Moon. It is the lunar equivalent of the division between night and day on the Earth spheroid, although the Moon's much lower rate of rotation means it takes longer for it to pass across the surface. At the equator, it moves at 15.4 kilometres per hour (9.6 mph), as fast as an …