Lecture 5: Planetary system formation theories o Topics to be covered:
... Very massive stars are rare and distant. o Probability of massive star coming close to another star is therefore very low. o Sun’s nearest companion is Proxima Centauri (d =1.3 pc => Rsun=/d ~2x10-8). ...
... Very massive stars are rare and distant. o Probability of massive star coming close to another star is therefore very low. o Sun’s nearest companion is Proxima Centauri (d =1.3 pc => Rsun=/d ~2x10-8). ...
(ATLAST): Characterizing Habitable Worlds
... Number of nearby stars capable of hosting potentially habitable planets is not large (e.g., To maximize chance for a successful non-binary, solarthe type or later). searchsize for lifeD3in the solar neighborhood Sample ...
... Number of nearby stars capable of hosting potentially habitable planets is not large (e.g., To maximize chance for a successful non-binary, solarthe type or later). searchsize for lifeD3in the solar neighborhood Sample ...
5-E Galaxy T - McDonald Observatory
... Galaxies, compared to their size, are closer together than stars. They are also much more massive, having the combined mass of billions of stars. So, even over a large distance the force of gravity between galaxies can accelerate them toward each other. Think of bowling balls (galaxies) on a trampol ...
... Galaxies, compared to their size, are closer together than stars. They are also much more massive, having the combined mass of billions of stars. So, even over a large distance the force of gravity between galaxies can accelerate them toward each other. Think of bowling balls (galaxies) on a trampol ...
Solar System Teacher Tips
... Orbit: the path of an object in space, as it travels around another object. Oort Cloud: an area well beyond the planets (about one light year from the Sun) where billions of comets slowly orbit the Sun. The outer edge of the Oort Cloud is the gravitational boundary of our solar system. Planet: a hug ...
... Orbit: the path of an object in space, as it travels around another object. Oort Cloud: an area well beyond the planets (about one light year from the Sun) where billions of comets slowly orbit the Sun. The outer edge of the Oort Cloud is the gravitational boundary of our solar system. Planet: a hug ...
Physics@Brock - Brock University
... 44. As a source of light approaches the event horizon an observer at a fixed distance from the event horizon will observe the emitted light to have longer and longer wavelengths. This is caused by (a) the Doppler effect. (b) the gravitational redshift. (c) the cosmological redshift. (d) [None of the ...
... 44. As a source of light approaches the event horizon an observer at a fixed distance from the event horizon will observe the emitted light to have longer and longer wavelengths. This is caused by (a) the Doppler effect. (b) the gravitational redshift. (c) the cosmological redshift. (d) [None of the ...
the stars - Uni Heidelberg
... main sequence, a roughly diagonal curve. Astronomers have discovered that stars move on the diagram during their life, spending most of their life on the main sequence. The “life" of a star is called “evolution" (see the box on stellar evolution). 90 % of stars lie on the main sequence, with blue st ...
... main sequence, a roughly diagonal curve. Astronomers have discovered that stars move on the diagram during their life, spending most of their life on the main sequence. The “life" of a star is called “evolution" (see the box on stellar evolution). 90 % of stars lie on the main sequence, with blue st ...
THE STARS G. Iafrate(a), M. Ramella(a) and V. Bologna(b) (a) INAF
... main sequence, a roughly diagonal curve. Astronomers have discovered that stars move on the diagram during their life, spending most of their life on the main sequence. The “life" of a star is called “evolution" (see the box on stellar evolution). 90 % of stars lie on the main sequence, with blue st ...
... main sequence, a roughly diagonal curve. Astronomers have discovered that stars move on the diagram during their life, spending most of their life on the main sequence. The “life" of a star is called “evolution" (see the box on stellar evolution). 90 % of stars lie on the main sequence, with blue st ...
Is there life outside of Earth? Activity 2: Moving Stars and Their Planets
... In this model, students will change the mass of planet using the “planet-diameter” slider and the “Rocky-planet” switch. A rocky planet is denser than a gaseous planet, so the mass of the rocky planet will be higher than a gaseous planet of the same size. The mass of the student-created planet is gi ...
... In this model, students will change the mass of planet using the “planet-diameter” slider and the “Rocky-planet” switch. A rocky planet is denser than a gaseous planet, so the mass of the rocky planet will be higher than a gaseous planet of the same size. The mass of the student-created planet is gi ...
Night Sky Checklist October–November
... there are some similar brightness stars near it that help observers notice when its brightness drops off. Algol is an eclipsing variable star in Perseus. Only moderately bright at best at magnitude 2.1, it dims to about 1/3 that brightness for about 10 hours in a cycle of slightly less than 3 days. ...
... there are some similar brightness stars near it that help observers notice when its brightness drops off. Algol is an eclipsing variable star in Perseus. Only moderately bright at best at magnitude 2.1, it dims to about 1/3 that brightness for about 10 hours in a cycle of slightly less than 3 days. ...
... With the hi-precision setting activated, and an accurate alignment, the LX200 is capable of a pointing accuracy of 1 arc minute (for comparison, the 6.4 mm eyepiece has a FOV of about 10 arc minutes and the CCD has one of about 8x11 arc minutes). Technically, in order to use the hi-precision pointin ...
Document
... for hydrogen, helium and oxygen. Here I am convinced that there is something seriously wrong with the present theory. It is clearly impossible that hydrogen should be a million times more abundant than the metals, and I have no doubt that the number of hydrogen atoms in the two quantum state is enor ...
... for hydrogen, helium and oxygen. Here I am convinced that there is something seriously wrong with the present theory. It is clearly impossible that hydrogen should be a million times more abundant than the metals, and I have no doubt that the number of hydrogen atoms in the two quantum state is enor ...
Magnitude of Stars - What`s Out Tonight?
... noticeable object in the sky. It is also the closest celestial body to the Earth and the only natural object to orbit our planet. The Moon circles the Earth counterclockwise about every 29 days, close to a month’s time. This rate and direction of movement makes the Moon rise in the east about 50 min ...
... noticeable object in the sky. It is also the closest celestial body to the Earth and the only natural object to orbit our planet. The Moon circles the Earth counterclockwise about every 29 days, close to a month’s time. This rate and direction of movement makes the Moon rise in the east about 50 min ...
PowerPoint
... city blocks. c) two grains of sand 100 light- years apart. d) two golf balls 100 km apart. e) two baseballs 100 yards apart. ...
... city blocks. c) two grains of sand 100 light- years apart. d) two golf balls 100 km apart. e) two baseballs 100 yards apart. ...
PeGASus Newsletter Issue #68 – Oct. 1996
... the most interesting areas in all the night skies. A cool fall evening is often the result of a high pressure air mass hanging over us, this usually means clear stable viewing with less moisture in the air to cloud the seeing. Add to this the early arrival of darkness, and how can you resist seeking ...
... the most interesting areas in all the night skies. A cool fall evening is often the result of a high pressure air mass hanging over us, this usually means clear stable viewing with less moisture in the air to cloud the seeing. Add to this the early arrival of darkness, and how can you resist seeking ...
The Life And Times Of A Star
... surface is over 100 times farther from the center). The escape velocity from the sun’s surface is reduced by 10 times. The fastest moving gas atoms at the sun’s surface can now easily escape into space. ...
... surface is over 100 times farther from the center). The escape velocity from the sun’s surface is reduced by 10 times. The fastest moving gas atoms at the sun’s surface can now easily escape into space. ...
PDF only - at www.arxiv.org.
... Sleep, 2002; Jones et al., 2001), to simulate the orbital motion of Earth-mass planets over one billion years, in a sample of such systems. If a terrestrial planet could exist in a stable orbit for this length of time it is likely to be able to exist there for the duration of that star’s main sequen ...
... Sleep, 2002; Jones et al., 2001), to simulate the orbital motion of Earth-mass planets over one billion years, in a sample of such systems. If a terrestrial planet could exist in a stable orbit for this length of time it is likely to be able to exist there for the duration of that star’s main sequen ...
Solar evolution and the distant future of Earth
... Solar evolution stronomy textbooks tell us that one day the Sun will expand to become a red supergiant of enormous size, finally swallowing its inner ...
... Solar evolution stronomy textbooks tell us that one day the Sun will expand to become a red supergiant of enormous size, finally swallowing its inner ...
The Life Cycle of Stars Stars are a fascinating part of our universe
... After a star is born, it enters the main sequence phase of its life. The amount of time a star remains in the main sequence phase depends upon its mass. Smaller stars remain here much longer than larger stars. The main sequence stage is the longest stage in star’s life cycle. Small stars can remain ...
... After a star is born, it enters the main sequence phase of its life. The amount of time a star remains in the main sequence phase depends upon its mass. Smaller stars remain here much longer than larger stars. The main sequence stage is the longest stage in star’s life cycle. Small stars can remain ...
