The extreme physical properties of the CoRoT-7b super
... al. (2008) and Tian et al. (2008) proposed non-vanishing values, e.g. a few tenths, which would still point to a strong erosion of the atmosphere. In agreement with Valencia et al. (2010), we conclude that the atmospheric erosion processes for CoRoT-7b are likely to be so efficient that volatile spe ...
... al. (2008) and Tian et al. (2008) proposed non-vanishing values, e.g. a few tenths, which would still point to a strong erosion of the atmosphere. In agreement with Valencia et al. (2010), we conclude that the atmospheric erosion processes for CoRoT-7b are likely to be so efficient that volatile spe ...
1. This question is about some of the properties of Barnard`s star
... This question is about some of the properties of Barnard’s star. Barnard’s star, in the constellation Ophiuchus, has a parallax angle of 0.549 arc-second as measured from Earth. (a) ...
... This question is about some of the properties of Barnard’s star. Barnard’s star, in the constellation Ophiuchus, has a parallax angle of 0.549 arc-second as measured from Earth. (a) ...
galctr
... • Solution: ambipolar diffusion (assisted by turbulence in cloud or disk) What defines core masses => stellar masses? • Jeans-mass core has M~ LJ2 with LJ =(v2 + cs2)/(G ) if thermally+turbulently supported; magnetically critical 1/~ 2 G 1/2/B ; combine to obtain M crit,turb ~ v4 /(G 3/2 B) ...
... • Solution: ambipolar diffusion (assisted by turbulence in cloud or disk) What defines core masses => stellar masses? • Jeans-mass core has M~ LJ2 with LJ =(v2 + cs2)/(G ) if thermally+turbulently supported; magnetically critical 1/~ 2 G 1/2/B ; combine to obtain M crit,turb ~ v4 /(G 3/2 B) ...
The Stars Tonight
... depicted on a flat surface, like the page of a book. Rather than being shown from directly above, artists often portray the orbit from an oblique perspective. Try it for yourself! Take a circular object, like a CD, and look at it from directly above. It looks like a circle. Now tip the back edge of ...
... depicted on a flat surface, like the page of a book. Rather than being shown from directly above, artists often portray the orbit from an oblique perspective. Try it for yourself! Take a circular object, like a CD, and look at it from directly above. It looks like a circle. Now tip the back edge of ...
www.astro.org.uk www.facebook.com/Stra ordAstro www.twi er.com
... Astronomers survey the scale of the Universe by first measuring the distances to close-by objects and then using them as standard candles to pin down distances further and further out into the cosmos. Up to now finding an accurate distance to the Large Magellanic Cloud (LMC), one of the nearest galaxi ...
... Astronomers survey the scale of the Universe by first measuring the distances to close-by objects and then using them as standard candles to pin down distances further and further out into the cosmos. Up to now finding an accurate distance to the Large Magellanic Cloud (LMC), one of the nearest galaxi ...
Notes
... Degenerate carbon-oxygen core, He- and H-burning shells, thin H layer, shrouded in dust from superwind (proto-planetary nebula) Mass loss rate decreases but wind speed increases Hydrogen layer thins further from mass loss and He burning shell Star evolves at constant luminosity (~104LSun), shrinking ...
... Degenerate carbon-oxygen core, He- and H-burning shells, thin H layer, shrouded in dust from superwind (proto-planetary nebula) Mass loss rate decreases but wind speed increases Hydrogen layer thins further from mass loss and He burning shell Star evolves at constant luminosity (~104LSun), shrinking ...
OBSERVATIONS (1)
... Let’s think about these things one (or three) at a time. • Every day the Sun rises in the east and sets in the west. This is evidently what the Sun is doing, and there are still people who “believe” that it does exactly that. They have elaborate explanations for why all the observations that scienc ...
... Let’s think about these things one (or three) at a time. • Every day the Sun rises in the east and sets in the west. This is evidently what the Sun is doing, and there are still people who “believe” that it does exactly that. They have elaborate explanations for why all the observations that scienc ...
Howard 2013 Observed properties of exoplanets
... observer. (B) Planets are detectable during transit by the decrease in Orbital period ratios in multi-transiting planets, whereas the mass distribution is stellar brightness (solid white line). Transit depth is proportional to the uncertain at the 50% level near 1 Earth blocked fraction of the stell ...
... observer. (B) Planets are detectable during transit by the decrease in Orbital period ratios in multi-transiting planets, whereas the mass distribution is stellar brightness (solid white line). Transit depth is proportional to the uncertain at the 50% level near 1 Earth blocked fraction of the stell ...
1 - People Server at UNCW
... Be clear and neat in your work. Any illegible work, or scribbling in the margins, will not be graded. Put a box around your answers when appropriate.. If you need more space, you may use the back of a page and write On back of page # in the problem space or the attached blank sheet. No other scratch ...
... Be clear and neat in your work. Any illegible work, or scribbling in the margins, will not be graded. Put a box around your answers when appropriate.. If you need more space, you may use the back of a page and write On back of page # in the problem space or the attached blank sheet. No other scratch ...
Chapter 10 Cycles and Patterns in Space D64 Lesson Preview
... are much hotter than on Earth. Nighttime temperatures are much colder. The Moon's diameter is only about one-fourth Earth's diameter. Because the Moon is smaller, its gravity is weaker than Earth's gravity. So things weigh less on the Moon than they do on Earth. COMPARE AND CONTRAST Compare the dayt ...
... are much hotter than on Earth. Nighttime temperatures are much colder. The Moon's diameter is only about one-fourth Earth's diameter. Because the Moon is smaller, its gravity is weaker than Earth's gravity. So things weigh less on the Moon than they do on Earth. COMPARE AND CONTRAST Compare the dayt ...
doc - Jnoodle
... In the center we have the sun, our closest star. There are so far 9 known planets, of which the 5 inner have been known since ancient times, Uranus was discovered in the 18th and Neptune in the 19th century, Pluto as late as 1930. The gravitational disturbances on the orbits of thus far known planet ...
... In the center we have the sun, our closest star. There are so far 9 known planets, of which the 5 inner have been known since ancient times, Uranus was discovered in the 18th and Neptune in the 19th century, Pluto as late as 1930. The gravitational disturbances on the orbits of thus far known planet ...
Our Place in a Vast Universe
... be statistically the same everywhere. (There do not seem to be significant structures much larger than superclusters, or larger than about 1% of the furthest distance we can see.) The universe is also highly isotropic, with the superclusters of galaxies statistically nearly the same in all direction ...
... be statistically the same everywhere. (There do not seem to be significant structures much larger than superclusters, or larger than about 1% of the furthest distance we can see.) The universe is also highly isotropic, with the superclusters of galaxies statistically nearly the same in all direction ...
nov7
... Jupiter has more heavy elements than the Sun does. If both formed from the same nebula, why do you think that is? Jupiter: 71% hydrogen, 24% helium, 5% heavier elements Sun: 73.4% hydrogen, 25% helium, 1.6% heaver elements ...
... Jupiter has more heavy elements than the Sun does. If both formed from the same nebula, why do you think that is? Jupiter: 71% hydrogen, 24% helium, 5% heavier elements Sun: 73.4% hydrogen, 25% helium, 1.6% heaver elements ...
Planetary Orbit Simulator – Student Guide
... limited the semi-major axis to 50 AU since that covers most of the objects in which we are interested in our solar system and have limited eccentricity to 0.7 since the ellipses would be hard to fit on the screen for larger values. Note that the semi-major axis is aligned horizontally for all ellipt ...
... limited the semi-major axis to 50 AU since that covers most of the objects in which we are interested in our solar system and have limited eccentricity to 0.7 since the ellipses would be hard to fit on the screen for larger values. Note that the semi-major axis is aligned horizontally for all ellipt ...
TAP 704- 8: The ladder of astronomical distances
... nearby things, using the baseline between your two eyes, which see things in slightly different directions. The trouble is that even the nearest star, Alpha Centauri, is more than 200 000 times further away than the diameter of the Earth’s orbit. The shift in angle is less than 1 second of arc, less ...
... nearby things, using the baseline between your two eyes, which see things in slightly different directions. The trouble is that even the nearest star, Alpha Centauri, is more than 200 000 times further away than the diameter of the Earth’s orbit. The shift in angle is less than 1 second of arc, less ...
I. Early History of Astronomy
... 5. Three laws of planetary motion a. Orbits of the planets are elliptical b. Planets revolve around the Sun at varying speed (Faster at perihelion…..slower at aphelion) ...
... 5. Three laws of planetary motion a. Orbits of the planets are elliptical b. Planets revolve around the Sun at varying speed (Faster at perihelion…..slower at aphelion) ...
Rare Earth hypothesis
In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.