PARALLAX – IT`S SIMPLE! Abstract
... You cannot travel to the stars and measure their distance directly using some kind of “ruler”. ...
... You cannot travel to the stars and measure their distance directly using some kind of “ruler”. ...
Aldebaran
... miles, but Aldebaran’s diameter is 40 to 52 times that. Aldebaran’s temperature is 4100° Kelvin, which is much colder than our Sun, whose temperature is about 5778° Kelvin. Aldebaran is red, while our Sun is yellow. Aldebaran is 65.1 light years away from the Sun. ...
... miles, but Aldebaran’s diameter is 40 to 52 times that. Aldebaran’s temperature is 4100° Kelvin, which is much colder than our Sun, whose temperature is about 5778° Kelvin. Aldebaran is red, while our Sun is yellow. Aldebaran is 65.1 light years away from the Sun. ...
Searching for Dwarf Galaxies and Population III Star
... a result, the primary identifying feature in the rest-frame ultraviolet spectra of early stars is a strong HeII (1640 Å) emission line. One of the best environments to discover these sources is the chemically unevolved surroundings of a large galaxy or proto-cluster of galaxies at high redshift. The ...
... a result, the primary identifying feature in the rest-frame ultraviolet spectra of early stars is a strong HeII (1640 Å) emission line. One of the best environments to discover these sources is the chemically unevolved surroundings of a large galaxy or proto-cluster of galaxies at high redshift. The ...
Stellar Masses
... stably. Objects with masses slightly below this limit are called brown dwarfs, and are ‘star like’ in the sense that nuclear burning of deuterium occurs in their core. Below a mass of 0.015M⊙ (roughly 16 times the mass of Jupiter) not even deuterium burning can occur, and these objects are perhaps b ...
... stably. Objects with masses slightly below this limit are called brown dwarfs, and are ‘star like’ in the sense that nuclear burning of deuterium occurs in their core. Below a mass of 0.015M⊙ (roughly 16 times the mass of Jupiter) not even deuterium burning can occur, and these objects are perhaps b ...
Astro Physics Notes and Study Guide 2015-17
... In Northern (or southern) latitudes, they rise at an angle. ...
... In Northern (or southern) latitudes, they rise at an angle. ...
DTU_9e_ch15
... just hints at spiral structure. The galactic nucleus is marked with a dot surrounded by a circle. Details in the large, blank, wedge-shaped region toward the upper left of the map are unknown, because gas in this part of the sky is moving perpendicular to our line of sight and thus does not exhibit ...
... just hints at spiral structure. The galactic nucleus is marked with a dot surrounded by a circle. Details in the large, blank, wedge-shaped region toward the upper left of the map are unknown, because gas in this part of the sky is moving perpendicular to our line of sight and thus does not exhibit ...
Chapter 1 The Discovery of Open Clusters - Willmann-Bell
... Very faint nebulae Planetary nebulae Very large nebulae Very compressed, rich clusters of stars Compressed clusters of small and large stars Coarsely scattered clusters of stars. Although now long superseded, the Herschel designations which resulted from this classification system proved sufficientl ...
... Very faint nebulae Planetary nebulae Very large nebulae Very compressed, rich clusters of stars Compressed clusters of small and large stars Coarsely scattered clusters of stars. Although now long superseded, the Herschel designations which resulted from this classification system proved sufficientl ...
5 - White Dwarfs - University of Texas Astronomy
... matter orbits both stars in the orbital plane, this great amount of matter will form an approximately spherical red-giant-like envelope around both stars. Both the tiny white dwarf core of the original red giant and the innocent main sequence companion will orbit around inside this envelope. The res ...
... matter orbits both stars in the orbital plane, this great amount of matter will form an approximately spherical red-giant-like envelope around both stars. Both the tiny white dwarf core of the original red giant and the innocent main sequence companion will orbit around inside this envelope. The res ...
Document
... a pancake with a bulge at its center that contains millions of stars, primarily old ones. This nuclear bulge has the Galactic nucleus at its center. The nucleus itself is only about 10 light-years across. 2. The disk. The part of the pancake outside the bulge is called the Galactic disk. It extends ...
... a pancake with a bulge at its center that contains millions of stars, primarily old ones. This nuclear bulge has the Galactic nucleus at its center. The nucleus itself is only about 10 light-years across. 2. The disk. The part of the pancake outside the bulge is called the Galactic disk. It extends ...
Star Formation in the Galaxy, An Observational Overview
... is again balanced by internal pressure. After this phase such stars will eject their outer atmospheres producing planetary nebula and leaving behind a white dwarf stellar remnant. More massive stars experience a more complex post-main sequence evolution during which they will fuse heavier elements i ...
... is again balanced by internal pressure. After this phase such stars will eject their outer atmospheres producing planetary nebula and leaving behind a white dwarf stellar remnant. More massive stars experience a more complex post-main sequence evolution during which they will fuse heavier elements i ...
Distance Measures: Parallax
... this background? This is because the center of your eyes are a few centimeters apart from each other, so each eye as a different point of view. Because stars are SO far away, their parallaxes are most conveniently measured in seconds of arc (arc seconds). The angular size of your thumb held at arm’s ...
... this background? This is because the center of your eyes are a few centimeters apart from each other, so each eye as a different point of view. Because stars are SO far away, their parallaxes are most conveniently measured in seconds of arc (arc seconds). The angular size of your thumb held at arm’s ...
AAVSO: Epsilon Aurigae
... Now is an exciting time to familiarize yourself with this fascinating star, as we countdown to a rare eclipse starting in mid-2009. Although epsilon Aurigae has been a known binary for over a century, it isn't yet known what exactly is eclipsing what! The curious light curves of the eclipses have be ...
... Now is an exciting time to familiarize yourself with this fascinating star, as we countdown to a rare eclipse starting in mid-2009. Although epsilon Aurigae has been a known binary for over a century, it isn't yet known what exactly is eclipsing what! The curious light curves of the eclipses have be ...
identifying seasonal stars in kaurna astronomical traditions
... emu on the celestial plain, while the Mangkamangkaranna (the Pleiades star cluster) represents a group of girls digging roots. The red star Madletaltarni, probably Betelgeuse (Alpha Orionis) or Aldebaran (Alpha Taurii), is the mother of the Tinniinyaranna, and Parnakkoyerli is the father, described ...
... emu on the celestial plain, while the Mangkamangkaranna (the Pleiades star cluster) represents a group of girls digging roots. The red star Madletaltarni, probably Betelgeuse (Alpha Orionis) or Aldebaran (Alpha Taurii), is the mother of the Tinniinyaranna, and Parnakkoyerli is the father, described ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.