The Helix Nebula • NGC 7293
... dwarf that seems to float in a sea of blue gas [white dot in center of nebula]. These tentacles, which superficially resemble comets, formed when a hot “stellar wind” of particles plowed into colder shells of dust and gas ejected previously by the doomed star. The comet-like tentacles have been obse ...
... dwarf that seems to float in a sea of blue gas [white dot in center of nebula]. These tentacles, which superficially resemble comets, formed when a hot “stellar wind” of particles plowed into colder shells of dust and gas ejected previously by the doomed star. The comet-like tentacles have been obse ...
Luminosity
... — Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. — A star’s mass determines its position along the main sequence (high mass: luminous and blue; low mass: faint and red). ...
... — Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. — A star’s mass determines its position along the main sequence (high mass: luminous and blue; low mass: faint and red). ...
1 Introduction - High Point University
... they reach their peak brightness and begin to fade. They are only useful as distance indicators if it is possible to calibrate them—to relate their observed brightness profile to absolute magnitudes. Type I supernovae are very uniform—the light curves and spectra for Type I supernovae are all fairly ...
... they reach their peak brightness and begin to fade. They are only useful as distance indicators if it is possible to calibrate them—to relate their observed brightness profile to absolute magnitudes. Type I supernovae are very uniform—the light curves and spectra for Type I supernovae are all fairly ...
Galactic Structure
... field halo must have been accreted/disrupted prior to self-enrichment by Type Ia supernovae And also formed stars only a long time ago, so if similar to surviving satellites and would have extended SFH, need to have been accreted a long time (~10Gyr) ago ...
... field halo must have been accreted/disrupted prior to self-enrichment by Type Ia supernovae And also formed stars only a long time ago, so if similar to surviving satellites and would have extended SFH, need to have been accreted a long time (~10Gyr) ago ...
Distances of the Stars
... The smallest parallax measurable from the ground is about 0.01-arcsec • Measure distances out to ~100 pc • Get 10% distances only to a few parsecs. • But, only a few hundred stars this close ...
... The smallest parallax measurable from the ground is about 0.01-arcsec • Measure distances out to ~100 pc • Get 10% distances only to a few parsecs. • But, only a few hundred stars this close ...
lecture
... stable orbital speed, there is no way to tell where the gas is in the system. • Therefore the only way to map it is with the velocities from the Doppler Shift and phases from the timing of the observations. • Make a contour map using velocity and phase ...
... stable orbital speed, there is no way to tell where the gas is in the system. • Therefore the only way to map it is with the velocities from the Doppler Shift and phases from the timing of the observations. • Make a contour map using velocity and phase ...
charts_set_8
... Low mass stars (K and M stars): a trillion years! While on Main Sequence, stellar core has H -> He fusion, by p-p chain in stars like Sun or less massive. In more massive stars, “CNO cycle” becomes more important. ...
... Low mass stars (K and M stars): a trillion years! While on Main Sequence, stellar core has H -> He fusion, by p-p chain in stars like Sun or less massive. In more massive stars, “CNO cycle” becomes more important. ...
Properties of Stars - Indiana State University
... the main sequence • Generally, 90% of a group of stars will be on the main sequence; however, a few stars will be cool but very luminous (upper right part of H-R diagram), while others will be hot and dim (lower left part of H-R ...
... the main sequence • Generally, 90% of a group of stars will be on the main sequence; however, a few stars will be cool but very luminous (upper right part of H-R diagram), while others will be hot and dim (lower left part of H-R ...
Lecture 4: Telescopes Web site Stuff from last time Naked eye and magnitudes
... How can you tell if a star is circumpolar from your location? Why do we have time zones? How can you use the stars to get your latitude and longitude? ...
... How can you tell if a star is circumpolar from your location? Why do we have time zones? How can you use the stars to get your latitude and longitude? ...
File - YEAR 11 EBSS PHYSICS DETAILED STUDIES
... star. After some careful observation, a relationship was established between mass an luminosity. L is proportional to m3, so a star twice as heavy as the sun will be eight times as bright. ...
... star. After some careful observation, a relationship was established between mass an luminosity. L is proportional to m3, so a star twice as heavy as the sun will be eight times as bright. ...
Celestial Distances
... Thus, their brightness changes with time In contrast, most stars are constant in their luminosity (at least within a percent or two) ...
... Thus, their brightness changes with time In contrast, most stars are constant in their luminosity (at least within a percent or two) ...
The classification of stellar spectra
... - neutral element: H I, He I, Fe I, etc. - single-ionized element: H II, O II, etc. - double-ionized element: O III, etc. ...
... - neutral element: H I, He I, Fe I, etc. - single-ionized element: H II, O II, etc. - double-ionized element: O III, etc. ...
Galaxy
... called double stars or binary stars – 3 stars are called triple stars Sometimes binary stars cannot be seen from Earth – only one star can be seen ...
... called double stars or binary stars – 3 stars are called triple stars Sometimes binary stars cannot be seen from Earth – only one star can be seen ...
Name
... A) They all tend to fuse Hydrogen into Helium B) They all tend to have similar diameters. C) They all tend to have similar temperatures. D) They all tend to have similar masses. E) They all tend to fuse Helium into Carbon. 16) If you moved a star that is 30 parsecs from Earth to a distance of 60 par ...
... A) They all tend to fuse Hydrogen into Helium B) They all tend to have similar diameters. C) They all tend to have similar temperatures. D) They all tend to have similar masses. E) They all tend to fuse Helium into Carbon. 16) If you moved a star that is 30 parsecs from Earth to a distance of 60 par ...
Name - MIT
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
Name - MIT
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
Astronomy Activity: The Life-Line of the Stars
... Just like a fire flame (like a burning match) has different colors, so do the stars. This is because stars have different temperatures. Really hot stars are blue or white-hot. Cool stars are red or redish-orange in color. Astronomers classify stars based on what they are made of (in addition to hydr ...
... Just like a fire flame (like a burning match) has different colors, so do the stars. This is because stars have different temperatures. Really hot stars are blue or white-hot. Cool stars are red or redish-orange in color. Astronomers classify stars based on what they are made of (in addition to hydr ...
Events: - Temecula Valley Astronomers
... Now, look back at Jupiter again. To the left or east of Jupiter is the constellation Leo. Leo (The Lion) is our spring constellation that enters the beginning of the ‘Galaxy Constellations’ well into the summer months. The “head”, “shoulders” and “Chest” of Leo forms what looks like a “sickle” or re ...
... Now, look back at Jupiter again. To the left or east of Jupiter is the constellation Leo. Leo (The Lion) is our spring constellation that enters the beginning of the ‘Galaxy Constellations’ well into the summer months. The “head”, “shoulders” and “Chest” of Leo forms what looks like a “sickle” or re ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.