White Dwarfs - Indiana University
... – All WDs have a common origin (PNN) with some hydrogen, upper limit of 10-4 solar masses to 10-15 solar masses of hydrogen (recall that 10-4 is the limit where H burning stops) – Only about 10-15 is needed to produce an optically thick H layer at the ...
... – All WDs have a common origin (PNN) with some hydrogen, upper limit of 10-4 solar masses to 10-15 solar masses of hydrogen (recall that 10-4 is the limit where H burning stops) – Only about 10-15 is needed to produce an optically thick H layer at the ...
Chapter 13 section 3
... time, the white dwarf will cool and stop giving off light. The length time it takes for a star to go through its stages of life depends on its mass. The stages happen more quickly and more violently in stars that are more than eight times more massive than the Sun. In massive stars, the core heats u ...
... time, the white dwarf will cool and stop giving off light. The length time it takes for a star to go through its stages of life depends on its mass. The stages happen more quickly and more violently in stars that are more than eight times more massive than the Sun. In massive stars, the core heats u ...
January 2013 - astronomy for beginners
... It is very easy to find as it sparkles low in the east. When As Sirius is known as ‘the ‘Dog Star’ the smaller it is seen using binoculars it appears to flash many companion has become known as ‘the Pup’ but its correct different colours, white, red, blue and even green. The scientific name is Siriu ...
... It is very easy to find as it sparkles low in the east. When As Sirius is known as ‘the ‘Dog Star’ the smaller it is seen using binoculars it appears to flash many companion has become known as ‘the Pup’ but its correct different colours, white, red, blue and even green. The scientific name is Siriu ...
The Death of Stars
... • Supernovae produce remnants: expanding shells of gas rich with heavy elements. • Perhaps the most famous is the “Crab Nebula” from a supernova in 1054 AD. It was so bright, Chinese, Japanese, and Arab astronomers saw it for months during the day, and could be seen for 2 years at night. • The remna ...
... • Supernovae produce remnants: expanding shells of gas rich with heavy elements. • Perhaps the most famous is the “Crab Nebula” from a supernova in 1054 AD. It was so bright, Chinese, Japanese, and Arab astronomers saw it for months during the day, and could be seen for 2 years at night. • The remna ...
Stellar Evolution
... Mass Loss from Giant Stars All stars lose mass via some form of stellar wind Most massive stars have the strongest winds O- and B-type stars can lose a tenth of their total mass this way in only a million years Stellar winds hollow out cavities in the interstellar medium surrounding giant stars. ...
... Mass Loss from Giant Stars All stars lose mass via some form of stellar wind Most massive stars have the strongest winds O- and B-type stars can lose a tenth of their total mass this way in only a million years Stellar winds hollow out cavities in the interstellar medium surrounding giant stars. ...
Brock physics - Brock University
... (a) * electron degeneracy pressure. (b) neutron degeneracy pressure. (c) high pressure caused by the extremely high density and temperature of the core. (d) high pressure caused by intense gravity of the massive star. 33. Neutron stars have densities that are (a) about 10 times as dense as white dwa ...
... (a) * electron degeneracy pressure. (b) neutron degeneracy pressure. (c) high pressure caused by the extremely high density and temperature of the core. (d) high pressure caused by intense gravity of the massive star. 33. Neutron stars have densities that are (a) about 10 times as dense as white dwa ...
850616SemStudyGuide_AstSns
... the gas and dust from the nebula went into forming the sun. Some of it went into forming the planets, their moons and the other objects in the solar system that orbit the sun (like comets, meteoroids and asteroids). The evidence used to support this theory includes the presence of iron throughout th ...
... the gas and dust from the nebula went into forming the sun. Some of it went into forming the planets, their moons and the other objects in the solar system that orbit the sun (like comets, meteoroids and asteroids). The evidence used to support this theory includes the presence of iron throughout th ...
universe.pps - Prophet Muhammad For All
... The map shows several stars visible with the naked eye which are located deep within the Orion arm. The most notable group of stars here are main stars in the constellation of Orion -from which the spiral arm gets its name. All of these stars are bright giant and supergiant -stars, thousands of time ...
... The map shows several stars visible with the naked eye which are located deep within the Orion arm. The most notable group of stars here are main stars in the constellation of Orion -from which the spiral arm gets its name. All of these stars are bright giant and supergiant -stars, thousands of time ...
Chapter 10 Measuring the Stars: Giants, Dwarfs, and the Main
... * Some stars are supergiants and are also located near the top right (_______________) * White dwarfs are hot, faint, small stars near the bottom of the diagram • Some white dwarfs are Earth sized * Bright and near stars plotted on diagram Extending the Cosmic Distance Scale * Spectroscopic Parallax ...
... * Some stars are supergiants and are also located near the top right (_______________) * White dwarfs are hot, faint, small stars near the bottom of the diagram • Some white dwarfs are Earth sized * Bright and near stars plotted on diagram Extending the Cosmic Distance Scale * Spectroscopic Parallax ...
Octobers Meeting - Tauranga Astronomical Society
... have made it back. The DVD shown to the Tauranga Astronomical Society on Wednesday 26th. November gave a graphic description of all the things that could have gone wrong with just about every stage of the journey and miraculously everything went as hoped – all the safeguards that had been planned to ...
... have made it back. The DVD shown to the Tauranga Astronomical Society on Wednesday 26th. November gave a graphic description of all the things that could have gone wrong with just about every stage of the journey and miraculously everything went as hoped – all the safeguards that had been planned to ...
lecture19 - Stony Brook University
... that are moving away from us with huge speeds, using the observed Doppler shifts of known spectral lines. This indicates that they are very very far away (we will make this connection between recessional velocity and distance clear later – it’s called the Hubble expansion of the universe). From the ...
... that are moving away from us with huge speeds, using the observed Doppler shifts of known spectral lines. This indicates that they are very very far away (we will make this connection between recessional velocity and distance clear later – it’s called the Hubble expansion of the universe). From the ...
Powerpoint file
... Now estimate number of planets with life in our Galaxy (not number with intelligent, communicating life) If we leave out fi and fc (i.e. assume they are unity—all life forms develop our kind of intelligence and technology and try to communicate), we are calculating the number of life-bearing planet ...
... Now estimate number of planets with life in our Galaxy (not number with intelligent, communicating life) If we leave out fi and fc (i.e. assume they are unity—all life forms develop our kind of intelligence and technology and try to communicate), we are calculating the number of life-bearing planet ...
Star Show FACILITATOR NOTES
... closely matches the Sun’s spectrum must have a temperature very close to the temperature at the Sun’s visible surface—well over 5000°C. Except for specialized lights used in photography, most real light filaments operate at a lower temperature (around 2500°C) which gives a more reddish-orange color ...
... closely matches the Sun’s spectrum must have a temperature very close to the temperature at the Sun’s visible surface—well over 5000°C. Except for specialized lights used in photography, most real light filaments operate at a lower temperature (around 2500°C) which gives a more reddish-orange color ...
Protostars and planets
... between planets and stars seemed too obvious to require precise formulation when the only planets known were those in the Solar System: the most massive of them is only MJupiter ≈ 10−3 M⊙ , and there are many of them follow approximately circular orbits about the Sun (indeed “planet” comes from Gree ...
... between planets and stars seemed too obvious to require precise formulation when the only planets known were those in the Solar System: the most massive of them is only MJupiter ≈ 10−3 M⊙ , and there are many of them follow approximately circular orbits about the Sun (indeed “planet” comes from Gree ...
The Night Sky This Month - Usk Astronomical Society
... towards conjunction at the end of November; it is way past its best. By the end of the month, Saturn is only 8° above the horizon at sunset so observe Saturn as soon as you can this month, in the south-west. Uranus is at opposition on the 15th and is visible throughout the night this month. At a mag ...
... towards conjunction at the end of November; it is way past its best. By the end of the month, Saturn is only 8° above the horizon at sunset so observe Saturn as soon as you can this month, in the south-west. Uranus is at opposition on the 15th and is visible throughout the night this month. At a mag ...
Spectral analysis for the RV Tau star R Sct: In this section, we will
... Many of our stars are monitored photometrically by the AAVSO. Their web site (http://www.aavso.org)) provides a light curve generator which can give (as the default) the latest few week time period or (what we usually need to do) a light curve covering the date of our specific spectroscopic observat ...
... Many of our stars are monitored photometrically by the AAVSO. Their web site (http://www.aavso.org)) provides a light curve generator which can give (as the default) the latest few week time period or (what we usually need to do) a light curve covering the date of our specific spectroscopic observat ...
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.