1 - BYU Physics and Astronomy
... of the studied object is not blurred by the earth's atmosphere, (e) the entire sky can be observed. 73. The sun will continue to be a main-sequence star for about another (a) ten thousand years, (b) one million years, (c) five million years, (d) five billion years, (e) ten billion years. 74. It is t ...
... of the studied object is not blurred by the earth's atmosphere, (e) the entire sky can be observed. 73. The sun will continue to be a main-sequence star for about another (a) ten thousand years, (b) one million years, (c) five million years, (d) five billion years, (e) ten billion years. 74. It is t ...
The Milky Way
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are ...
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: – Apparent Magnitude (m) – Spectral Type (O, B, A, F, G, K, M) – Luminosity Class (Main Sequence, Giant, etc…). These are ...
Death of massive stars
... there is no way for a nearby object to escape its gravitational pull. • It can be identified by either how much space it takes up or by the mass. ...
... there is no way for a nearby object to escape its gravitational pull. • It can be identified by either how much space it takes up or by the mass. ...
star life cycle
... 10. What might happen next to the gases making up a nebula? They can be drawn in by gravity and start a new star ...
... 10. What might happen next to the gases making up a nebula? They can be drawn in by gravity and start a new star ...
Geography
... The North Star is located at the end of the handle of the Little Dipper. The Polestar is the brightest of the Little Dipper stars. ...
... The North Star is located at the end of the handle of the Little Dipper. The Polestar is the brightest of the Little Dipper stars. ...
Document
... Stellar Masses How massive are stars? • Kepler’s Laws – devised for the planets. • Apply to any object that orbits another object. • Kepler’s Third Law relates: – Period: “how long it takes to orbit something” – Semimajor axis: “how far you are away from that something” – Mass: “how much gravity is ...
... Stellar Masses How massive are stars? • Kepler’s Laws – devised for the planets. • Apply to any object that orbits another object. • Kepler’s Third Law relates: – Period: “how long it takes to orbit something” – Semimajor axis: “how far you are away from that something” – Mass: “how much gravity is ...
The correct answers are written in bold, italic and underlined. The
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
ASTRONOMY
... 19. How could you observe the California Nebula? 20. To what constellation do Castor and Pollux belong? 21. Where would you place Lynx in relationship to Gemini’s position? 22. What unique feature is found in Camelopardalis 23. What two prominent constellations are found in the southern skies? 24. ...
... 19. How could you observe the California Nebula? 20. To what constellation do Castor and Pollux belong? 21. Where would you place Lynx in relationship to Gemini’s position? 22. What unique feature is found in Camelopardalis 23. What two prominent constellations are found in the southern skies? 24. ...
General Astrophysical Concepts: Astronomical length scales
... to the black hole’s mass The event horizon or Schwarzschild radius of a black hole, the region over which it is capable of trapping light (radiation), is proportional to the black hole’s mass “A black hole has no hair” is a statement that describes the loss of identity of matter when it is swallowed ...
... to the black hole’s mass The event horizon or Schwarzschild radius of a black hole, the region over which it is capable of trapping light (radiation), is proportional to the black hole’s mass “A black hole has no hair” is a statement that describes the loss of identity of matter when it is swallowed ...
Page 1 of 4 Name PSCI 1055 Test #4 (Form B) Spring 2008 Buckley
... a. Sirius is considered to be a class A star. What is the expected temperature range of the Sirius? ...
... a. Sirius is considered to be a class A star. What is the expected temperature range of the Sirius? ...
The Ever Expanding Universe
... luminosity is directly related to the square of the distance to a star. There are about 700 Cepheid variable type stars in the Milky Way galaxy, the North Star Polaris being the most famous. Cepheids became crucial in determining distance throughout the Milky Way. And Cepheids would have a starring ...
... luminosity is directly related to the square of the distance to a star. There are about 700 Cepheid variable type stars in the Milky Way galaxy, the North Star Polaris being the most famous. Cepheids became crucial in determining distance throughout the Milky Way. And Cepheids would have a starring ...
Analyzing Spectra
... black lines are caused by elements in the star's atmosphere. As light emitted from a star passes through the star's atmosphere, some of it is absorbed by elements in the atmosphere. The wavelengths of the light that are absorbed appear as dark lines in the spectrum. Each element absorbs certain wave ...
... black lines are caused by elements in the star's atmosphere. As light emitted from a star passes through the star's atmosphere, some of it is absorbed by elements in the atmosphere. The wavelengths of the light that are absorbed appear as dark lines in the spectrum. Each element absorbs certain wave ...
Elements and Isotopes - University of California, Berkeley
... The temperature and pressure in the core are extreme enough for fusion (and the Sun’s gravity keeps them that way). Most energy is produced in the inner 20%. Convection carries the energy in the outer 30%. Most of the mass is in the inner 50% because the density is much higher. ...
... The temperature and pressure in the core are extreme enough for fusion (and the Sun’s gravity keeps them that way). Most energy is produced in the inner 20%. Convection carries the energy in the outer 30%. Most of the mass is in the inner 50% because the density is much higher. ...
Friday, Oct. 10
... How do astronomers use parallax to measure the distances to stars? Why does parallax vary inversely with distance? Describe and explain the relationship between a star’s apparent brightness (or flux), its absolute brightness (or luminosity), and its distance from us. Describe and explain the relatio ...
... How do astronomers use parallax to measure the distances to stars? Why does parallax vary inversely with distance? Describe and explain the relationship between a star’s apparent brightness (or flux), its absolute brightness (or luminosity), and its distance from us. Describe and explain the relatio ...
SE 1.0 - Edquest
... Astronomers are discovering these are more common than first thought. Although they are invisible to observers, using even the most powerful telescopes, Astronomers know of their existence because of how matter near it becomes very hot and bright. Because these bodies are so dense, even light cannot ...
... Astronomers are discovering these are more common than first thought. Although they are invisible to observers, using even the most powerful telescopes, Astronomers know of their existence because of how matter near it becomes very hot and bright. Because these bodies are so dense, even light cannot ...
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. ...
Astronomy 110 Announcements: 11.1 Properties of Stars
... Main-sequence stars are fusing hydrogen into helium in their cores like the Sun ...
... Main-sequence stars are fusing hydrogen into helium in their cores like the Sun ...
Distance to Stars
... Proxima Centauri • The next closest star is 40 trillion km from the sun. (more than 260,000AU) • Light takes 4.2 years to reach Earth. ...
... Proxima Centauri • The next closest star is 40 trillion km from the sun. (more than 260,000AU) • Light takes 4.2 years to reach Earth. ...
AnwerkeyTypes-of-stars-and-HR-diagram
... _______________Red_________ 5. List the colors from hottest to Coldest: __Blue, white, yellow, orange, red______________________ ________________________ 6.Most stars on the diagram are classified as which type of star: __main sequence_____________________ 7. How is it possible for white dwarfs to h ...
... _______________Red_________ 5. List the colors from hottest to Coldest: __Blue, white, yellow, orange, red______________________ ________________________ 6.Most stars on the diagram are classified as which type of star: __main sequence_____________________ 7. How is it possible for white dwarfs to h ...
Compact Objects
... These two beams are swept around like a lighthouse due to the star’s rotation When the beam is pointed at us, the pulsar is “on”, when it is pointed away it is “off” ...
... These two beams are swept around like a lighthouse due to the star’s rotation When the beam is pointed at us, the pulsar is “on”, when it is pointed away it is “off” ...
Life Cycle of a Star - Intervention Worksheet
... 3. Nebula can form either an _________ star that is about the size of our Sun or a ___________ star which can be over three times as big as our Sun! These stars stay in this period for most of their lives and they convert hydrogen to helium while generating lots of heat and light. ...
... 3. Nebula can form either an _________ star that is about the size of our Sun or a ___________ star which can be over three times as big as our Sun! These stars stay in this period for most of their lives and they convert hydrogen to helium while generating lots of heat and light. ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.