Lecture 36: Strange New Worlds
... Orbital Periods < 10 days Inside the orbit of Mercury Densities like Jupiter and Saturn, so they are gas giants. Selection effect? How does a Jupiter-size gas planet get so close to its parent star? ...
... Orbital Periods < 10 days Inside the orbit of Mercury Densities like Jupiter and Saturn, so they are gas giants. Selection effect? How does a Jupiter-size gas planet get so close to its parent star? ...
PowerPoint - Chandra X
... High resolution observations revealed the existence of soft (kT ~ 0.24 keV) point source of X-rays -presumably a neutron star-- embedded in a nebula of cometary morphology within the supernova remnant. Interpreting the cometary nebula as due to a pulsar wind with a bow shock due to its motion throug ...
... High resolution observations revealed the existence of soft (kT ~ 0.24 keV) point source of X-rays -presumably a neutron star-- embedded in a nebula of cometary morphology within the supernova remnant. Interpreting the cometary nebula as due to a pulsar wind with a bow shock due to its motion throug ...
ASTRONOMY 120
... 4. Chaisson Review and Discussion 20.6 Roughly how big (in A.U.) will the Sun become when it enters the red-giant phase? (3 points) A star like the Sun will evolve into a red giant with a size about 100 times its current size. This is equivalent to about 70 million km, or almost half an AU. 5. Chai ...
... 4. Chaisson Review and Discussion 20.6 Roughly how big (in A.U.) will the Sun become when it enters the red-giant phase? (3 points) A star like the Sun will evolve into a red giant with a size about 100 times its current size. This is equivalent to about 70 million km, or almost half an AU. 5. Chai ...
General Astronomy - Stockton University
... Nearby stars are the best because: Planets are brighter. The angular separation between planets and the star is larger Stars are brighter Doppler shifts easier to measure Motions on the sky easier to measure Stars with distance less than 10 parsecs from the Sun ...
... Nearby stars are the best because: Planets are brighter. The angular separation between planets and the star is larger Stars are brighter Doppler shifts easier to measure Motions on the sky easier to measure Stars with distance less than 10 parsecs from the Sun ...
Lecture7 - UCSB Physics
... • The formation of terrestrial planets around a star is thought to have occurred by what process? • A) Breakup of a large disk of matter which formed around the star • B) Condensation of gas from the original star nebula • C) Capture by the star of objects traversing the depths of space • D) Acc ...
... • The formation of terrestrial planets around a star is thought to have occurred by what process? • A) Breakup of a large disk of matter which formed around the star • B) Condensation of gas from the original star nebula • C) Capture by the star of objects traversing the depths of space • D) Acc ...
Chapter 15 Surveying the Stars
... • Stellar properties depend on both mass and age: those that have finished fusing H to He in their cores are no longer on the main sequence • All stars become larger and redder after exhausting their core hydrogen: giants and ...
... • Stellar properties depend on both mass and age: those that have finished fusing H to He in their cores are no longer on the main sequence • All stars become larger and redder after exhausting their core hydrogen: giants and ...
Measuring the Sky - Physics and Astronomy and more!
... Huygens had a similar idea to Descartes: Use a screen to cover up the sun, but poke a hole in the screen so that the amount of sun that shines through the hole is equal to, say, Sirius The ratio of the hole to the sun’s disk would be the same as the ratio of the distance to Sirius to the ...
... Huygens had a similar idea to Descartes: Use a screen to cover up the sun, but poke a hole in the screen so that the amount of sun that shines through the hole is equal to, say, Sirius The ratio of the hole to the sun’s disk would be the same as the ratio of the distance to Sirius to the ...
Unit 1
... hydrogen into helium is called its main sequence lifetime – Stars spend most of their lives on the main sequence – Lifetime depends on the star’s mass and luminosity • More luminous stars burn their energy more rapidly than less luminous stars. • High-mass stars are more luminous than low-mass stars ...
... hydrogen into helium is called its main sequence lifetime – Stars spend most of their lives on the main sequence – Lifetime depends on the star’s mass and luminosity • More luminous stars burn their energy more rapidly than less luminous stars. • High-mass stars are more luminous than low-mass stars ...
White Dwarfs, Neutron Stars, and Black Holes
... speed of a particle of an ideal gas is proportional to the square root of the temperature, fusion will only occur at high temperatures. A combination of high stellar core temperatures and quantum mechanical tunneling makes fusion possible in stellar cores. The heavier elements have more nuclear char ...
... speed of a particle of an ideal gas is proportional to the square root of the temperature, fusion will only occur at high temperatures. A combination of high stellar core temperatures and quantum mechanical tunneling makes fusion possible in stellar cores. The heavier elements have more nuclear char ...
Although a wall looks real, solid to sight and feel, a wall is not a wall
... 740 elephants. (The World Almanac and Book of Facts – 1996) Bear in mind that 32 pounds of you is skeleton, if typical. (L. M. Boyd) A massive star has a shorter lifetime than a less massive star. The more massive a star, the more tightly its gravity pulls it together, the hotter it must be to keep ...
... 740 elephants. (The World Almanac and Book of Facts – 1996) Bear in mind that 32 pounds of you is skeleton, if typical. (L. M. Boyd) A massive star has a shorter lifetime than a less massive star. The more massive a star, the more tightly its gravity pulls it together, the hotter it must be to keep ...
Astronomy 122 mid Term Exam
... Note that this has nothing to do with Supernova but about 1/3 of the student responses talked about supernova. 9. We observe a binary star system in which both stars have the same physical age. However, one of these stars is a 10 solar mass main sequence star while its companion is a 1 solar mass wh ...
... Note that this has nothing to do with Supernova but about 1/3 of the student responses talked about supernova. 9. We observe a binary star system in which both stars have the same physical age. However, one of these stars is a 10 solar mass main sequence star while its companion is a 1 solar mass wh ...
Review for Exam 2
... 1) How are distances to nearby stars measured? What is the distance to the nearest star in light years? 2) What is the equa6on rela6ng parallax and distance? 3) What is luminosity? How is it measure ...
... 1) How are distances to nearby stars measured? What is the distance to the nearest star in light years? 2) What is the equa6on rela6ng parallax and distance? 3) What is luminosity? How is it measure ...
Chapter 11 Review
... Why are the distances between bodies in the solar system not measured in light-years? Why is it best to use a long baseline when determining distances using triangulation? Explain why parallax is not a good technique for determining distances of stars that are extremely far away (that is, greater th ...
... Why are the distances between bodies in the solar system not measured in light-years? Why is it best to use a long baseline when determining distances using triangulation? Explain why parallax is not a good technique for determining distances of stars that are extremely far away (that is, greater th ...
Watch - ggg999.org
... By using information from all of the modes, we can model the inside of the Sun! Good news! There are more than a million modes Bad news! There are more than a million modes ...
... By using information from all of the modes, we can model the inside of the Sun! Good news! There are more than a million modes Bad news! There are more than a million modes ...
Distances to the Stars in Leo
... matter for astronomers, or anyone else for that matter, to determine the absolute magnitude of the star using the distance-magnitude relation. However, most stars are too far away to have a measurable parallax. In these cases, the distance to the star must be determined by some other method. We can ...
... matter for astronomers, or anyone else for that matter, to determine the absolute magnitude of the star using the distance-magnitude relation. However, most stars are too far away to have a measurable parallax. In these cases, the distance to the star must be determined by some other method. We can ...
Five Women at the Crossroads of Astronomy - Physics
... • Get the fun and excitement of doing science across to the young. Stress that science requires imagination, creativity, and ardor. • Provide children with positive role models early on, both in the home and at school. • Nurture everyone who enters college wanting to be a ...
... • Get the fun and excitement of doing science across to the young. Stress that science requires imagination, creativity, and ardor. • Provide children with positive role models early on, both in the home and at school. • Nurture everyone who enters college wanting to be a ...
Stars: some basic characteristics
... Since stars emit a thermal spectrum (at least approximately), by measuring the ratio of a star’s brightness at a blue wavelength and a redder wavelength, we can estimate it’s temperature. ...
... Since stars emit a thermal spectrum (at least approximately), by measuring the ratio of a star’s brightness at a blue wavelength and a redder wavelength, we can estimate it’s temperature. ...
White Dwarf Stars
... • These objects act as cosmic clocks and are useful for probing the dynamics of stars. ...
... • These objects act as cosmic clocks and are useful for probing the dynamics of stars. ...
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.