giant molecular clouds
... Protostars Protostars = pre-birth state of stars: Hydrogen to Helium fusion not yet ignited ...
... Protostars Protostars = pre-birth state of stars: Hydrogen to Helium fusion not yet ignited ...
White Dwarfs
... Globular clusters formed 12-14 billion years ago. Useful info for studying the history of the Milky Way Galaxy. ...
... Globular clusters formed 12-14 billion years ago. Useful info for studying the history of the Milky Way Galaxy. ...
Star Formation
... time from same molecular cloud - Association-tens of young stars not gravitationally bound together ...
... time from same molecular cloud - Association-tens of young stars not gravitationally bound together ...
Stars
... • Our sun shows absorption lines for hydrogen (marked with an H) and other heavier elements. ...
... • Our sun shows absorption lines for hydrogen (marked with an H) and other heavier elements. ...
astr100_finalexam
... [1] In the scientific method, a hypothesis is _____. A ) is a statement of fact B ) makes a prediction that can be tested C ) is usually proven to be correct D ) can only be tested once E ) all of these [2] Which of the following can be considered a definition of "theory?" A ) A theory can be an exp ...
... [1] In the scientific method, a hypothesis is _____. A ) is a statement of fact B ) makes a prediction that can be tested C ) is usually proven to be correct D ) can only be tested once E ) all of these [2] Which of the following can be considered a definition of "theory?" A ) A theory can be an exp ...
Space Science Unit - World of Teaching
... • This chart uses surface temperature of the star and the absolute magnitude (brightness) of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). Th ...
... • This chart uses surface temperature of the star and the absolute magnitude (brightness) of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). Th ...
Getting to Know: Structure of the Universe
... Mexican sombrero, is at least 28 million light years away. Even if spaceships could travel at the speed of light, it would still take 28 million years to reach the Sombrero galaxy. ...
... Mexican sombrero, is at least 28 million light years away. Even if spaceships could travel at the speed of light, it would still take 28 million years to reach the Sombrero galaxy. ...
Properties of stars
... • Read the instructions and questions carefully. • Discuss the concepts and your answers with one another. Take time to understand it now!!!! • Come to a consensus answer you both agree on. • If you get stuck or are not sure of your answer, ask ...
... • Read the instructions and questions carefully. • Discuss the concepts and your answers with one another. Take time to understand it now!!!! • Come to a consensus answer you both agree on. • If you get stuck or are not sure of your answer, ask ...
Astronomy Unit Period
... __________ 34. Which of the following statements is NOT true of supernovas? a. They are explosions in which a massive star collapses. b. They are explosions that occur at the beginning of a star’s life. c. They can be brighter than an entire galaxy for several days. d. They are explosions in which a ...
... __________ 34. Which of the following statements is NOT true of supernovas? a. They are explosions in which a massive star collapses. b. They are explosions that occur at the beginning of a star’s life. c. They can be brighter than an entire galaxy for several days. d. They are explosions in which a ...
Space Science Unit
... • This chart uses surface temperature of the star and the absolute magnitude (brightness) of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). Th ...
... • This chart uses surface temperature of the star and the absolute magnitude (brightness) of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). Th ...
Chapter 40
... • Largest stars have no force strong enough to stop them from contracting • Collapse until they disappear from observable universe…a black hole • Speed of collapse increases until it is faster than the speed of light, therefore we can’t see ...
... • Largest stars have no force strong enough to stop them from contracting • Collapse until they disappear from observable universe…a black hole • Speed of collapse increases until it is faster than the speed of light, therefore we can’t see ...
Planisphere
... distortion, constellations in the sky will not appear as they do on the planisphere, but the planisphere can help us identify bright stars and give us a general idea of where to look for other stars. It's also very useful in figuring out when certain star will rise or set. The best way to get comfor ...
... distortion, constellations in the sky will not appear as they do on the planisphere, but the planisphere can help us identify bright stars and give us a general idea of where to look for other stars. It's also very useful in figuring out when certain star will rise or set. The best way to get comfor ...
The Mass-Luminosity Relationship and Stellar Lifetimes
... they should last a lot longer than smaller stars. • It doesn’t work this way, however. If the luminosity of a star increases with the 4th power of the mass, that means that the star is producing energy and using its fuel at the same faster rate. ...
... they should last a lot longer than smaller stars. • It doesn’t work this way, however. If the luminosity of a star increases with the 4th power of the mass, that means that the star is producing energy and using its fuel at the same faster rate. ...
Stellar Evolution (Powerpoint) 17
... • Added luminosity is so strong, it lifts the red giant’s low density outer envelope completely off the star. • As it expands, its opacity drops and we see to a deeper and deeper and hotter and hotter depth, so the star moves left on the HR diagram • Until… we see the electron degenerate core; the n ...
... • Added luminosity is so strong, it lifts the red giant’s low density outer envelope completely off the star. • As it expands, its opacity drops and we see to a deeper and deeper and hotter and hotter depth, so the star moves left on the HR diagram • Until… we see the electron degenerate core; the n ...
March 2010 - Pomona Valley Amateur Astronomers
... Besides spiral galaxies there are elliptical galaxies, thought to be older galaxies that have lost their arms. About 20 percent are elliptical, 75 percent spiral, and 5 percent irregular. There are also rare Seyfert spiral galaxies characterized by an exceptionally bright nucleus. These were discove ...
... Besides spiral galaxies there are elliptical galaxies, thought to be older galaxies that have lost their arms. About 20 percent are elliptical, 75 percent spiral, and 5 percent irregular. There are also rare Seyfert spiral galaxies characterized by an exceptionally bright nucleus. These were discove ...
(HR) Diagrams
... show how a star such as the sun (a G2 star while it is on the main sequence) evolves through the following stages: a. protostar (which may have formed in a Bok globule) to main sequence star b. main sequence star to red giant to helium flash c. ejecting a planetary nebula (which exposes an interior ...
... show how a star such as the sun (a G2 star while it is on the main sequence) evolves through the following stages: a. protostar (which may have formed in a Bok globule) to main sequence star b. main sequence star to red giant to helium flash c. ejecting a planetary nebula (which exposes an interior ...
09astrophysics_2007Nov
... only see one star, but we can see the spectral lines split and converge as the starts orbit. ...
... only see one star, but we can see the spectral lines split and converge as the starts orbit. ...
Ch. 19 (Starbirth)
... the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students exc ...
... the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students exc ...
Star Life Cycle Review 1. What is the first stage of star creation? A
... A star undergoes many different stages during its life. And after it dies, the material that made it up can be used by future stars. ...
... A star undergoes many different stages during its life. And after it dies, the material that made it up can be used by future stars. ...
Reach for the Stars – Div. B
... Large Magellanic Cloud (LMC). The Tarantula Nebula has an apparent magnitude of 8. Its distance is about 49 kpc or 160,000 light years. Its absolute brightness is so great that if it were as close to Earth as the Orion Nebula, the Tarantula Nebula would cast shadows. It is the most active and larges ...
... Large Magellanic Cloud (LMC). The Tarantula Nebula has an apparent magnitude of 8. Its distance is about 49 kpc or 160,000 light years. Its absolute brightness is so great that if it were as close to Earth as the Orion Nebula, the Tarantula Nebula would cast shadows. It is the most active and larges ...
Another Old Final
... (b) Estimate the distance to this supernova and the lookback time (how long ago we are observing it). (c) Type-Ia supernovae reach peak luminosities of 109 L . Estimate the peak apparent brightness of this supernova. Would it have been visible to the naked eye on a clear night? ...
... (b) Estimate the distance to this supernova and the lookback time (how long ago we are observing it). (c) Type-Ia supernovae reach peak luminosities of 109 L . Estimate the peak apparent brightness of this supernova. Would it have been visible to the naked eye on a clear night? ...
Solar System where_are_we
... the satellite COBE. The disk and center region of our Galaxy are readily recognizable. This image makes the Milky Way appear much more galaxylike and less like the smudge of stars we see stretching across our night sky. It is possible to imagine what our Milky Way might look like looking down on it ...
... the satellite COBE. The disk and center region of our Galaxy are readily recognizable. This image makes the Milky Way appear much more galaxylike and less like the smudge of stars we see stretching across our night sky. It is possible to imagine what our Milky Way might look like looking down on it ...
The Life Cycle of the Stars
... Like all stars, our Sun was formed from a cloud of hydrogen gas and dust that almost certainly included the ashes from an earlier star gone supernova. In its death throes, it created elements heavier than iron that our solar system inherited. Gravity pulled the cloud together into a giant ball. When ...
... Like all stars, our Sun was formed from a cloud of hydrogen gas and dust that almost certainly included the ashes from an earlier star gone supernova. In its death throes, it created elements heavier than iron that our solar system inherited. Gravity pulled the cloud together into a giant ball. When ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.