Orion – The Hunter - Guild of Students
... a mass of about 2000 times the mass of the Sun. This gas slowly collapses due to gravitation to form stars. This part of the nebula is visible whenever a new star is formed. M42 is an open cluster. ...
... a mass of about 2000 times the mass of the Sun. This gas slowly collapses due to gravitation to form stars. This part of the nebula is visible whenever a new star is formed. M42 is an open cluster. ...
Wien`s law - Uplift Education
... • If two stars have the same absolute magnitude but different apparent magnitude they would have the same brightness if they were both at distance of 10 pc from Earth, so we conclude they have the same luminosity, but are at different distances from Earth !!!!!!!!!!!!!! • Every one step in absolute ...
... • If two stars have the same absolute magnitude but different apparent magnitude they would have the same brightness if they were both at distance of 10 pc from Earth, so we conclude they have the same luminosity, but are at different distances from Earth !!!!!!!!!!!!!! • Every one step in absolute ...
A very massive runaway star from Cygnus OB2⋆
... Although the identication of BD+43 3654 as a likely runaway star dates back to van Buren & McCray (1988), no spectral classication is available in that work. Subsequent papers by van Buren et al. (1995) and Noriega-Crespo et al. (1997) refer to the star as a unspecied B-type but do not report ded ...
... Although the identication of BD+43 3654 as a likely runaway star dates back to van Buren & McCray (1988), no spectral classication is available in that work. Subsequent papers by van Buren et al. (1995) and Noriega-Crespo et al. (1997) refer to the star as a unspecied B-type but do not report ded ...
StarWalkKiDS manual en
... the secrets of our Universe just sitting comfortably in the arm-chair or during stargazing outside. With Star Walk™ Kids you can see the following object/events: • Stars and constellations • Solar system bodies (planets, the Sun, the Moon) • Movies about all the planets, most known constellations an ...
... the secrets of our Universe just sitting comfortably in the arm-chair or during stargazing outside. With Star Walk™ Kids you can see the following object/events: • Stars and constellations • Solar system bodies (planets, the Sun, the Moon) • Movies about all the planets, most known constellations an ...
2. Stellar Physics
... 1) Spherical symmetry An isolated, non-rotating star which does not contain strong magnetic fields will be spherically symmetric, i.e.: All quantities (e.g. density, temperature, pressure) depend only on the distance from the center of the star - radius r. Not a general property of all self-gravitat ...
... 1) Spherical symmetry An isolated, non-rotating star which does not contain strong magnetic fields will be spherically symmetric, i.e.: All quantities (e.g. density, temperature, pressure) depend only on the distance from the center of the star - radius r. Not a general property of all self-gravitat ...
The Application of Forbidden Line X-Ray Diagnostics to the Hot Star
... The radius of X-ray emission appears to be at about 1.5 - 3 R*. This is closer to the surface than expected for a normal stellar wind but too far for normal coronal activity. ...
... The radius of X-ray emission appears to be at about 1.5 - 3 R*. This is closer to the surface than expected for a normal stellar wind but too far for normal coronal activity. ...
Lecture 10 - University of Minnesota
... • Iron can’t be fused and give you energy • This picture is confirmed by observations – Young stars have higher metallicities – Even numbered elements much more common than odd numbered elements ...
... • Iron can’t be fused and give you energy • This picture is confirmed by observations – Young stars have higher metallicities – Even numbered elements much more common than odd numbered elements ...
lecture22
... While the exterior layers expand, the helium core continues to contract and eventually becomes hot enough (100 million Kelvin) for helium to begin to fuse into carbon (if M > 0.5 Mo) Carbon ash is deposited in core and eventually a heliumburning shell develops. This shell is itself surrounded by a ...
... While the exterior layers expand, the helium core continues to contract and eventually becomes hot enough (100 million Kelvin) for helium to begin to fuse into carbon (if M > 0.5 Mo) Carbon ash is deposited in core and eventually a heliumburning shell develops. This shell is itself surrounded by a ...
File - YEAR 11 EBSS PHYSICS DETAILED STUDIES
... 1 parsec is the distance to a star that would show 1 arcsec of parallax. (206 265 AU) ...
... 1 parsec is the distance to a star that would show 1 arcsec of parallax. (206 265 AU) ...
antarctic and associated exploration book collection
... through the roof of his house), and his measurement procedure (he made fewer than 10 observations over 6 months,). He also chose to measure star right ascension and declination rather than, more conveniently and accurately, differences in angular position of the star relative to another visually clo ...
... through the roof of his house), and his measurement procedure (he made fewer than 10 observations over 6 months,). He also chose to measure star right ascension and declination rather than, more conveniently and accurately, differences in angular position of the star relative to another visually clo ...
ISM and star formation
... Regions of gas and dust near stars just formed. The Hydrogen is essentially fully ionized. Temperatures near 10,000 K Sizes about 1-20 pc. Hot tenuous gas => emission lines (Kirchhoff's Laws) ...
... Regions of gas and dust near stars just formed. The Hydrogen is essentially fully ionized. Temperatures near 10,000 K Sizes about 1-20 pc. Hot tenuous gas => emission lines (Kirchhoff's Laws) ...
Astrophysics - Part 2
... Stefan’s law and Wien’s displacement law.General shape of black body curves, experimental verification is not required. Use of Wien’s displacement law to estimate black-body temperature of sources λmaxT = constant = 2.9 × 10-3 mK. Inverse square law, assumptions in its application. Use of Stefan’s l ...
... Stefan’s law and Wien’s displacement law.General shape of black body curves, experimental verification is not required. Use of Wien’s displacement law to estimate black-body temperature of sources λmaxT = constant = 2.9 × 10-3 mK. Inverse square law, assumptions in its application. Use of Stefan’s l ...
Masers and high mass star formation Claire Chandler
... • Massive, prestellar cold cores: Star has not formed yet, but molecular gas available (a few of these cores are known) • Massive hot cores: Star has formed already, but accretion so strong that quenches ionization => no HII region (tens are known) • Ultracompact HII region: Accretion has ceased and ...
... • Massive, prestellar cold cores: Star has not formed yet, but molecular gas available (a few of these cores are known) • Massive hot cores: Star has formed already, but accretion so strong that quenches ionization => no HII region (tens are known) • Ultracompact HII region: Accretion has ceased and ...
Lecture 5: The H-R diagram, standard candles and cosmic distances
... Spectroscopy makes it possible to study binary systems in which the two stars are close together • Some binaries can be detected and analysed, even though the two star images cannot be resolved • A spectrum binary appears to be a single star but has a spectrum with the absorption lines for two dis ...
... Spectroscopy makes it possible to study binary systems in which the two stars are close together • Some binaries can be detected and analysed, even though the two star images cannot be resolved • A spectrum binary appears to be a single star but has a spectrum with the absorption lines for two dis ...
LETTERS A giant planet orbiting the ‘extreme horizontal
... helium in its core and pulsating. The maximum radius of the redgiant precursor of V 391 Pegasi may have reached 0.7 AU, while the orbital distance of the planet during the stellar main-sequence phase is estimated to be about 1 AU. This detection of a planet orbiting a post-red-giant star demonstrate ...
... helium in its core and pulsating. The maximum radius of the redgiant precursor of V 391 Pegasi may have reached 0.7 AU, while the orbital distance of the planet during the stellar main-sequence phase is estimated to be about 1 AU. This detection of a planet orbiting a post-red-giant star demonstrate ...
Milky Way - Wayne Hu`s Tutorials
... the star can be measured - mapping the galaxy • Use the star counts to determine statistical properities: number density of stars in each patch of sky • A fall off in the number density in radial distance would determine the edge of the galaxy • Suppose there is an indicator of absolute magnitude li ...
... the star can be measured - mapping the galaxy • Use the star counts to determine statistical properities: number density of stars in each patch of sky • A fall off in the number density in radial distance would determine the edge of the galaxy • Suppose there is an indicator of absolute magnitude li ...
Classification and structure of galaxies
... • has about 200 billion stars, and lots of gas and dust • is a barred-spiral (we think) • about 100,000 light-years wide • our Sun is halfway to the edge, revolving at half a million miles per hour around the center of the Galaxy • takes our Solar System about 200 million years to revolve once aroun ...
... • has about 200 billion stars, and lots of gas and dust • is a barred-spiral (we think) • about 100,000 light-years wide • our Sun is halfway to the edge, revolving at half a million miles per hour around the center of the Galaxy • takes our Solar System about 200 million years to revolve once aroun ...
Death of Stars notes
... • The SOFIA finding demonstrates that supernovas not only produce dust, but that the dust can survive the explosion to become raw material for the formation of other stars—and planets. • This result supports the notion that most of the dust observed in distant young galaxies may have been made by su ...
... • The SOFIA finding demonstrates that supernovas not only produce dust, but that the dust can survive the explosion to become raw material for the formation of other stars—and planets. • This result supports the notion that most of the dust observed in distant young galaxies may have been made by su ...
Earth in Space and Time (SC.5.E.5.1)
... actually larger than the Sun. If this is true, why do these stars appear like points of light in the sky? A. These stars are hotter than the Sun. B. These stars have less mass than the Sun. C. These stars are farther away from Earth than the Sun is. D. These stars are made of different chemicals tha ...
... actually larger than the Sun. If this is true, why do these stars appear like points of light in the sky? A. These stars are hotter than the Sun. B. These stars have less mass than the Sun. C. These stars are farther away from Earth than the Sun is. D. These stars are made of different chemicals tha ...
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.