Astronomy and related astronomical terms
(the science of the celestial bodies: the sun, the moon, and the planets; the stars and galaxies; and all of the other objects in the universe)
As he raised his cup,
"Thank heavens my business
Is looking up."
2. A piece of rock or metal from space that reaches the surface of the earth, moon, or other celestial body.
Most meteorites are thought to be fragments from asteroids, although some may be pieces from the heads of comets. Most are stony, although some are made of iron and a few have a mixed rock-iron composition.
Both meteors and meteorites were meteoroids.
2. The general terms for meteors and micrometeroids, the latter usually having masses of less than a microgram.A series of four or five eclipses also occurs on the same dates after this interval.
It is interpreted in the "big bang theory" as the remnant of the initial explosion.
2. A faint band of light crossing the night sky, consisting of stars in the plane of our galaxy.
The Milky Way passes through the constellations of Cassiopeia, Perseus, Auriga, Orion, Canis Major, Puppis, Vela, Carina, Crux, Centaurus, Norma, Scorpius, Sagittarius, Scutum, Aquila, and Cygnus.
They probably represent planetesimals that failed to form a planet.
The light curve is irregular, with a varying range of brightness and of a period between peaks of brightness.
He was the first scientist to establish, based on the evidence of seismic wave behavior, the discontinuity that separates the crust of the planet earth from the mantle.
According to Mohorovičić, a layered structure would explain the observation of depths where seismic waves change speed and the difference in chemical composition between rocks from the crust and those from the mantle.
Andrija Mohorovičić was a Yugoslav geophysicist for whom the Mohorovicic discontinuity was named (1857-1936).
A water molecule consists of two atoms of hydrogen and one atom of oxygen.
Mercury and Venus are the only planets in the solar system that do not have moons.
Its headquarters are in Washington, D.C., and its main installation is at the Kennedy Space Center in Florida.
NASA's early planetary and lunar programs included Pioneer spacecraft from 1958, which gathered data for the later crewed missions, the most famous of which took the first people to the moon in Apollo 11 on July 16-24, 1969.
2. The tide raised on the earth when the sun and moon are in positions forming a right angle at the earth's center.
The two pulls (sun and moon) largely cancel each other out, resulting in an extra low high tide and an extra high low tide.
Through a telescope these patches are resolved into various kinds of diffuse nebulae, which are clouds of dust and gas that can be sen in the visible part of the spectrum.
Nebulae are classified in three basic types:
- Emission nebulae; ultraviolet radiation from nearby bright blue stars excites hydrogen atoms in the gas of an emission nebula.
- Dark nebulae; an absorption, or dark, nebula is seen as a dark patch, sometimes surrounded by a halo of light. The light from stars behind the nebula is either absorbed or scattered by the nebular material.
- Reflection nebulae; the dust particles in the cloud reflect and scatter the light from stars that are not hot enough to make the nebula itself emit light.
Also check out the Index of other Scientific and Technological Topics.