- Most amazing space phenomena full#
- Most amazing space phenomena professional#
- Most amazing space phenomena free#
The Moon and planets never stray far from the ecliptic. The path among the stars traced by the Sun throughout the year. When Earth’s shadow falls upon the Moon, it causes a lunar eclipse. A solar eclipse occurs when the Moon’s shadow falls upon Earth, which we see as the Moon blocking the Sun. The measure of how much an orbit deviates from being circular.Īn event that occurs when the shadow of a planet or moon falls upon a second body. It’s especially obvious during the Moon’s thin crescent phases. Sunlight reflected by Earth that makes the otherwise dark part of the Moon glow faintly.
Most amazing space phenomena professional#
Usually such stars orbit so closely that they appear as a single point of light even when viewed through professional telescopes. Many stars are multiples (doubles, triples, or more) gravitationally bound together. Line-of-sight doubles are a consequence of perspective and aren’t physically related. Two stars that lie very close to, and are often orbiting, each other. Dobs provide more aperture per dollar than any other telescope design. The celestial equivalent of latitude, denoting how far (in degrees) an object in the sky lies north or south of the celestial equator.Ī type of Newtonian reflector, made popular by amateur astronomer John Dobson, that uses a simple but highly effective wooden mount.
Most amazing space phenomena full#
Dark adaptation is rapid during the first 5 or 10 minutes after you leave a well-lit room, but full adaptation requires at least a half hour - and it can be ruined by a momentary glance at a bright light. The eyes’ transition to night vision, in order to see faint objects. The moment when a celestial object crosses the meridian and is thus at its highest above the horizon. Find a list of all 88 constellation names here. There are 88 official constellations, which technically define sections of the sky rather than collections of specific stars. When the Moon or a planet appears especially close either to another planet or to a bright star.Ī distinctive pattern of stars used informally to organize a part of the sky. The most popular designs are the Schmidt-Cassegrain telescope (SCT) and the Maksutov-Cassegrain telescope (commonly called a “Mak”). Named for their discoverers, comets sometimes make return visits after as little as a few years or as long as tens of thousands of years.Ī telescope with a mirror in the back and a lens in the front. When close to the Sun, the warmth evaporates the ice in the nucleus to form a coma (cloud of gas) and a tail. Most reflectors and compound telescopes require occasional collimation in order to produce the best possible images.Ī comet is a “dirty snowball” of ice and rocky debris, typically a few miles across, that orbits the Sun in a long ellipse. Declination and right ascension are the celestial equivalents of latitude and longitude.ĭenotes an object near a celestial pole that never dips below the horizon as Earth rotates and thus does not rise or set.Īligning the optical elements of a telescope so that they all point in the proper direction. It’s anchored to the celestial poles (directly above Earth’s north and south poles) and the celestial equator (directly above Earth’s equator). More recently, this has come to mean the second full Moon in a single calendar month.Ī grid system for locating things in the sky. Traditionally, something that happens rarely or never.
Most amazing space phenomena free#
Want to know more? Check out our FREE ebook on black holes. Many galaxies (including ours) have supermassive black holes at their centers. This technique can help you detect faint objects that are invisible when you stare directly at them.Ī few "beads" of sunlight, shining between mountain peaks and through the valleys along the Moon's edge in the moment before totality.Ī lens that’s placed into the focusing tube to effectively double or triple a telescope’s focal length and, in turn, the magnification of any eyepiece used with it.Ī concentration of mass so dense that nothing - not even light - can escape its gravitational pull once swallowed up. Viewing an object by looking slightly to its side.
The average distance from Earth to the Sun, slightly less than 93 million miles (150 million kilometers). A few venture closer to the Sun and cross Earth’s orbit.
Most are only a few miles in diameter and are found between the orbits of Mars and Jupiter, too small and far away to be seen easily in a small telescope. As a rule of thumb, a telescope’s maximum useful magnification is 50 times its aperture in inches (or twice its aperture in millimeters).Īny prominent star pattern that isn’t a whole constellation, such as the Northern Cross or the Big Dipper.Ī solid body orbiting the Sun that consists of metal and rock.
The diameter of a telescope’s main lens or mirror - and the scope’s most important attribute. Your index finger held at arm’s length spans about 1°, your fist about 10°. The apparent size of an object in the sky, or the distance between two objects, measured as an angle.
0 kommentar(er)
