tremaine_stanford
... Chaos in the solar system • the orbits of all the planets are chaotic with e-folding times for growth of small changes (Liapunov times) of 5-20 Myr (i.e. 200-1000 e-folds in lifetime of solar system • positions (orbital phases) of planets are not predictable on timescales longer than 100 Myr – futu ...
... Chaos in the solar system • the orbits of all the planets are chaotic with e-folding times for growth of small changes (Liapunov times) of 5-20 Myr (i.e. 200-1000 e-folds in lifetime of solar system • positions (orbital phases) of planets are not predictable on timescales longer than 100 Myr – futu ...
More on Stars and the Sky
... objects appear stationary. Why? What is the typical parallax of a nearby star? Why is it not possible to measure the parallax better than 0.01” from ground based instruments, but can be done from space? What is the precession of the Earth. Which of the following would change due to precession celest ...
... objects appear stationary. Why? What is the typical parallax of a nearby star? Why is it not possible to measure the parallax better than 0.01” from ground based instruments, but can be done from space? What is the precession of the Earth. Which of the following would change due to precession celest ...
Astronomy Study Guide #2
... (in R0)? How about Temperature ranges for these stars? 42. How do we detect an eclipsing double star? 43. What happens to a star during its pre-main sequence contraction? 44. What is so important about the Orion nebula? Pleiades? ...
... (in R0)? How about Temperature ranges for these stars? 42. How do we detect an eclipsing double star? 43. What happens to a star during its pre-main sequence contraction? 44. What is so important about the Orion nebula? Pleiades? ...
PowerPoint
... the blue end of the spectrum. • As the star moves away from us, the light shifts towards the red end of the spectrum. ...
... the blue end of the spectrum. • As the star moves away from us, the light shifts towards the red end of the spectrum. ...
relative size and distance
... • Apart from the fact that if it didn’t orbit the Sun the Earth would plummet to a spectacular and fiery doom, the way the Earth spends its time moving quietly from one side of the solar system to the other is extremely useful. • Twice every year our point of view of distant objects changes quite ra ...
... • Apart from the fact that if it didn’t orbit the Sun the Earth would plummet to a spectacular and fiery doom, the way the Earth spends its time moving quietly from one side of the solar system to the other is extremely useful. • Twice every year our point of view of distant objects changes quite ra ...
Question paper - Unit 5 (6PH05) - January 2012
... 3 A bridge vibrates gently as cars are driven across it. This is an example of A forced oscillation. B free oscillation. C resonance. D stationary waves. (Total for Question 3 = 1 mark) 4 A Hertzsprung-Russell diagram is plotted for an old star cluster. Compared with a young cluster containing a si ...
... 3 A bridge vibrates gently as cars are driven across it. This is an example of A forced oscillation. B free oscillation. C resonance. D stationary waves. (Total for Question 3 = 1 mark) 4 A Hertzsprung-Russell diagram is plotted for an old star cluster. Compared with a young cluster containing a si ...
Lives of Stars - Madison County Schools
... The white dwarf that results is usually about the size of Earth. But it still contains most of the original mass of the sun, meaning that it is about one million times denser than the original star. ...
... The white dwarf that results is usually about the size of Earth. But it still contains most of the original mass of the sun, meaning that it is about one million times denser than the original star. ...
Mercury venus and jupiter in March 2014
... Many a times we see Bright Venus in day light as well. But hardly we have seen Jupiter in day Light. But since last week we been observing Jupiter in a day light just before Sun Sets. Best time to locate those planets in day Light is when they are close to the Moon, so we can focus in that location ...
... Many a times we see Bright Venus in day light as well. But hardly we have seen Jupiter in day Light. But since last week we been observing Jupiter in a day light just before Sun Sets. Best time to locate those planets in day Light is when they are close to the Moon, so we can focus in that location ...
Day-6
... Coordinates Position Daily Motion (spin of Earth on its axis) Visibility of the sky Year Motion (Earth orbits the Sun) Seasons (tilt of the Earth’s axis) Precession of the equinoxes Motion and phases of the Moon Eclipses ...
... Coordinates Position Daily Motion (spin of Earth on its axis) Visibility of the sky Year Motion (Earth orbits the Sun) Seasons (tilt of the Earth’s axis) Precession of the equinoxes Motion and phases of the Moon Eclipses ...
Star and Planet Formation - Homepages of UvA/FNWI staff
... movement of the Earth on its orbit. 2. If the Earth rotates around its axis (as required to explain day and night), things should fly off the spinning planet. 3. If the Earth rotates around the Sun, we should observe parallaxes for the fixed stars. While the first two can actually be attributed to a ...
... movement of the Earth on its orbit. 2. If the Earth rotates around its axis (as required to explain day and night), things should fly off the spinning planet. 3. If the Earth rotates around the Sun, we should observe parallaxes for the fixed stars. While the first two can actually be attributed to a ...
understanding-the
... a. The red shift indicates that distant galaxies are moving away from each other. b. The red shift indicates that distant galaxies are moving towards each other. c. The blue shift indicates that distant galaxies are moving away from each other. d. The blue shift indicates that distant galaxies are m ...
... a. The red shift indicates that distant galaxies are moving away from each other. b. The red shift indicates that distant galaxies are moving towards each other. c. The blue shift indicates that distant galaxies are moving away from each other. d. The blue shift indicates that distant galaxies are m ...
Venus
... Venus is the __________________________ planet from the Sun in our Solar System. It is the _________________________ planet in our Solar System. This planet is covered with fastmoving sulphuric acid clouds which trap __________________________ from the Sun. Its thick atmosphere is mostly carbon diox ...
... Venus is the __________________________ planet from the Sun in our Solar System. It is the _________________________ planet in our Solar System. This planet is covered with fastmoving sulphuric acid clouds which trap __________________________ from the Sun. Its thick atmosphere is mostly carbon diox ...
Today`s Powerpoint
... Not enough radiating matter at large R to explain rotation curve => "dark" matter! Dark matter must be about 90% of the mass! Composition unknown. Probably mostly exotic particles that don't interact with ordinary matter at all (except gravity). Some may be brown dwarfs, dead white dwarfs … Most li ...
... Not enough radiating matter at large R to explain rotation curve => "dark" matter! Dark matter must be about 90% of the mass! Composition unknown. Probably mostly exotic particles that don't interact with ordinary matter at all (except gravity). Some may be brown dwarfs, dead white dwarfs … Most li ...
Homework #2
... 6) a) Star A and Star B both have the same luminosity. If Star A has a higher surface temperature than Star B, how do the radii of both stars compare to each other? No numbers are needed, but justify your answer using a relation/equation from class. b) The star Rigel has a luminosity approximately e ...
... 6) a) Star A and Star B both have the same luminosity. If Star A has a higher surface temperature than Star B, how do the radii of both stars compare to each other? No numbers are needed, but justify your answer using a relation/equation from class. b) The star Rigel has a luminosity approximately e ...
The Earth in the Solar System
... to consider as far back as the formation of our solar system. Solar system formation was a complex process that is not well understood because of the lack of data and the vast physical and chemical complexities of the process. However, there are certain key parameters that we do know. As discussed i ...
... to consider as far back as the formation of our solar system. Solar system formation was a complex process that is not well understood because of the lack of data and the vast physical and chemical complexities of the process. However, there are certain key parameters that we do know. As discussed i ...
STARS Chapter 8 Section 1
... A star is made up of different elements in the form of gases. The inner layers are very dense and hot. But the outer layers are made up of cool gases. Elements in a star’s atmosphere absorb some of the light that radiates from the star. Because different elements absorb different wavelengths of lig ...
... A star is made up of different elements in the form of gases. The inner layers are very dense and hot. But the outer layers are made up of cool gases. Elements in a star’s atmosphere absorb some of the light that radiates from the star. Because different elements absorb different wavelengths of lig ...
here
... especially Jupiter, is close to that of the Sun. • The internal structures of these planets is completely different from that of the Earth. In particular, there is no hard surface. • These planets are relatively far from the Sun (more than 5 times the Earth-Sun distance), so heating by the Sun is no ...
... especially Jupiter, is close to that of the Sun. • The internal structures of these planets is completely different from that of the Earth. In particular, there is no hard surface. • These planets are relatively far from the Sun (more than 5 times the Earth-Sun distance), so heating by the Sun is no ...
Mission 1 - NC State University
... The Earth also has an axis, and it rotates on its axis every 24 hours. This is why there are 24 hours in a day. Revolution is when the Earth moves in a circle around the Sun, and rotation is when the Earth spins on its axis. Because the Earth rotates one time every 24 hours, at any point in a day, h ...
... The Earth also has an axis, and it rotates on its axis every 24 hours. This is why there are 24 hours in a day. Revolution is when the Earth moves in a circle around the Sun, and rotation is when the Earth spins on its axis. Because the Earth rotates one time every 24 hours, at any point in a day, h ...
Secrets of the Sun
... Seasonal patterns of sunrise and sunset can be observed, described, and predicted. (By end of grade 2). The orbits of Earth around the sun and of the moon around Earth, together with the rotation of Earth about an axis between its North and South poles, cause observable patterns. These include day a ...
... Seasonal patterns of sunrise and sunset can be observed, described, and predicted. (By end of grade 2). The orbits of Earth around the sun and of the moon around Earth, together with the rotation of Earth about an axis between its North and South poles, cause observable patterns. These include day a ...
SDO | solar dynamics observatory
... Instruct students to repeat a day’s rotation, maintaining their tilt. (Make sure their heads are always pointed towards Polaris, this can be tricky for some students.) Instruct students to repeat the year’s revolution, adding in tilt, and then add in the day’s rotation. (Note: Some kids might get di ...
... Instruct students to repeat a day’s rotation, maintaining their tilt. (Make sure their heads are always pointed towards Polaris, this can be tricky for some students.) Instruct students to repeat the year’s revolution, adding in tilt, and then add in the day’s rotation. (Note: Some kids might get di ...
Main Types of Galaxies
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
Galaxies Powerpoint
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
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.