Week 9 notes
... – Most stars appear to be REDDER than they really are (cooler) – Stars of a given luminosity appear FAINTER than you would calculate given their distance and the inverse square law. ...
... – Most stars appear to be REDDER than they really are (cooler) – Stars of a given luminosity appear FAINTER than you would calculate given their distance and the inverse square law. ...
Neutron stars and black holes
... is about 0.877 X 10-13 cm (according to the Wikipedia). The volume of the proton is 4/3 r3 = 2.82 X 10-39 cm3. The density = mass/volume = 5.9 X 1014 g/cm3. The Sun’s mass is 2 X 1030 kg = 2 X 1033 g. A one solar mass black hole has radius r ~ 3 km = 3 X 105 cm. The average density within the Schw ...
... is about 0.877 X 10-13 cm (according to the Wikipedia). The volume of the proton is 4/3 r3 = 2.82 X 10-39 cm3. The density = mass/volume = 5.9 X 1014 g/cm3. The Sun’s mass is 2 X 1030 kg = 2 X 1033 g. A one solar mass black hole has radius r ~ 3 km = 3 X 105 cm. The average density within the Schw ...
The Origin of the Solar System: Progress in Understanding Accretion
... we thought that Jupiter-like planets would naturally form at the distance from a star where water would condense, and represent a natural bulge in the mass available in the disk, we now have many counter-examples. Extrasolar Jupiter-like planets range from a small fraction of an AU to tens of AU fro ...
... we thought that Jupiter-like planets would naturally form at the distance from a star where water would condense, and represent a natural bulge in the mass available in the disk, we now have many counter-examples. Extrasolar Jupiter-like planets range from a small fraction of an AU to tens of AU fro ...
test - Scioly.org
... 4) Clue: Most probably the result of a Ia supernovae as indicated by traces of Silicon and Iron, as well as a fortunate “light echo” of the initial explosion delayed by 400 years. 5) Clue: White dwarf binary system with the shortest orbital period known (approx. 5.4 minutes). These two bodies are in ...
... 4) Clue: Most probably the result of a Ia supernovae as indicated by traces of Silicon and Iron, as well as a fortunate “light echo” of the initial explosion delayed by 400 years. 5) Clue: White dwarf binary system with the shortest orbital period known (approx. 5.4 minutes). These two bodies are in ...
Prof. Kenney C lass 8 September 26, 2016
... *ANIM 20-1- stellar evolution: structure vs. location in HR diagram ...
... *ANIM 20-1- stellar evolution: structure vs. location in HR diagram ...
ppt
... and Paul Butler detected evidence that a planet, about the same mass as Jupiter, was circling the star. In 1999 they discovered two other planets. ...
... and Paul Butler detected evidence that a planet, about the same mass as Jupiter, was circling the star. In 1999 they discovered two other planets. ...
17 - Department of Physics and Astronomy
... In 1950 the great Dutch astronomer Jan Oort reasoned that the relatively-frequent sightings of long-period comets, and the large aphelion distances inferred for them, require a large reservoir of cometary bodies ~10000 AU from the Sun. He further reasoned from the wide range of orbit inclination a ...
... In 1950 the great Dutch astronomer Jan Oort reasoned that the relatively-frequent sightings of long-period comets, and the large aphelion distances inferred for them, require a large reservoir of cometary bodies ~10000 AU from the Sun. He further reasoned from the wide range of orbit inclination a ...
Solar system - Wikimedia Commons
... redder, becoming a red giant in about five billion years.[30] At that point its luminosity will be several thousand times its present value. ...
... redder, becoming a red giant in about five billion years.[30] At that point its luminosity will be several thousand times its present value. ...
15-3 Notes: Galaxies
... Large groups of stars, dust, and gas are called galaxies. Galaxies come in a variety of sizes and shapes. The largest galaxies contain more than a trillion stars. Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda ...
... Large groups of stars, dust, and gas are called galaxies. Galaxies come in a variety of sizes and shapes. The largest galaxies contain more than a trillion stars. Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda ...
Lecture7_2014_v2
... • Observed data (today) are most consistent with theory that all the planets formed out of the same cloud of gas at the same time • Some of the wide variety seen within the existing planets may be due to chance events like collisions • Discovery of planet-forming disks and actual planets around othe ...
... • Observed data (today) are most consistent with theory that all the planets formed out of the same cloud of gas at the same time • Some of the wide variety seen within the existing planets may be due to chance events like collisions • Discovery of planet-forming disks and actual planets around othe ...
13 Universal Gravitation
... For Newton’s idea to advance from hypothesis to scientific theory, it would have to be tested. • He reasoned that the mass of the moon should not affect how it falls, just as mass has no effect on the acceleration of freely falling objects on Earth. • How far the moon, or an apple at Earth’s surface ...
... For Newton’s idea to advance from hypothesis to scientific theory, it would have to be tested. • He reasoned that the mass of the moon should not affect how it falls, just as mass has no effect on the acceleration of freely falling objects on Earth. • How far the moon, or an apple at Earth’s surface ...
Signs of the Zodiac, Cancer
... Latin for crab and it is commonly represented as such. Its astrological symbol is . Cancer is relatively small among the constellations with an area of only 505 square degrees and its stars are rather faint; in fact it is the dimmest of the zodiacal constellations, having only two stars above the fo ...
... Latin for crab and it is commonly represented as such. Its astrological symbol is . Cancer is relatively small among the constellations with an area of only 505 square degrees and its stars are rather faint; in fact it is the dimmest of the zodiacal constellations, having only two stars above the fo ...
Stellar Evolution of Single Stars
... many complex processes. An active research area. 2)Main sequence phase: the longest phase of a star’s life ~ 1010 yrs for the Sun. Have M-L-R relations, Russell-Vogt theorem, as previously discussed. 3)Post-main sequence evolution: will discuss in detail next. ...
... many complex processes. An active research area. 2)Main sequence phase: the longest phase of a star’s life ~ 1010 yrs for the Sun. Have M-L-R relations, Russell-Vogt theorem, as previously discussed. 3)Post-main sequence evolution: will discuss in detail next. ...
