PS 224, Fall 2014 HW 4
... a: Dark cloud: Large molecular clouds develop dense regions that appear darker than surrounding regions. This can be precipitated by external pressure or forces or random fluctuations present in the cloud. These regions are very large, typically around 200,000 AU. b: Gravitational collapse: When the ...
... a: Dark cloud: Large molecular clouds develop dense regions that appear darker than surrounding regions. This can be precipitated by external pressure or forces or random fluctuations present in the cloud. These regions are very large, typically around 200,000 AU. b: Gravitational collapse: When the ...
Core instability models of giant planet accretion – II. Forming
... form several cores in the same disc. Initially we start the simulation with a number N planets,0 of cores through the disc, separated by 10 rH . This could have important consequences on the final distribution of masses and semimajor axis of extrasolar planets, especially for the changes in the dyna ...
... form several cores in the same disc. Initially we start the simulation with a number N planets,0 of cores through the disc, separated by 10 rH . This could have important consequences on the final distribution of masses and semimajor axis of extrasolar planets, especially for the changes in the dyna ...
Ch 8.3 - The Solar System
... - Without the use of an optical aid, we can see Venus, Mars, and Jupiter at night. - The inner solar system consists of Mercury, Venus, Earth, and Mars, Terrestrial Planets. - The giant planets, beyond Mars are; Jupiter, Saturn, Uranus, and Neptune, make up the outer Solar System. These are gaseous ...
... - Without the use of an optical aid, we can see Venus, Mars, and Jupiter at night. - The inner solar system consists of Mercury, Venus, Earth, and Mars, Terrestrial Planets. - The giant planets, beyond Mars are; Jupiter, Saturn, Uranus, and Neptune, make up the outer Solar System. These are gaseous ...
Stellar Evolution: After the Main Sequence
... surrounded by a shell through which hydrogen fusion works its way outward in the star • The core shrinks and becomes hotter, while the star’s outer layers expand and cool • The result is a red giant star ...
... surrounded by a shell through which hydrogen fusion works its way outward in the star • The core shrinks and becomes hotter, while the star’s outer layers expand and cool • The result is a red giant star ...
Astronomy - cloudfront.net
... B. The Moon is the result of a collision between the Earth and a Mars sized object in the early days of the Solar System (the collision theory). C. The Moon was originally a bulge on the Earth that was flung off by the rapidly spinning Earth (fission theory). D. The Moon formed somewhere else and wa ...
... B. The Moon is the result of a collision between the Earth and a Mars sized object in the early days of the Solar System (the collision theory). C. The Moon was originally a bulge on the Earth that was flung off by the rapidly spinning Earth (fission theory). D. The Moon formed somewhere else and wa ...
Stellar Evolution Hertzsprung-Russell Diagram Hertzsprung
... · nuclear fusion of hydrogen into helium produces energy · when fusion slows or stops, stars move off the main sequence · next stage is determined by a star's size ...
... · nuclear fusion of hydrogen into helium produces energy · when fusion slows or stops, stars move off the main sequence · next stage is determined by a star's size ...
RIPL Radio Interferometric Planet Search
... Sensitivity is limited by the short lever arm of VLBA observations: ~10 days RIPL will extend this lever arm by factor of 100 ...
... Sensitivity is limited by the short lever arm of VLBA observations: ~10 days RIPL will extend this lever arm by factor of 100 ...
Day 1212
... The outer layers expand and cool. In this late stage of its life cycle, an average star like our Sun is called a giant. ...
... The outer layers expand and cool. In this late stage of its life cycle, an average star like our Sun is called a giant. ...
Star Fromation and ISM
... • The protostar continues to collapse; when the core is dense and hot enough, fusion begins • The star still continues to collapse until the inward force of gravity is balanced by the outward pressure from the core. The star is now on the main sequence. • More massive stars follow the same process, ...
... • The protostar continues to collapse; when the core is dense and hot enough, fusion begins • The star still continues to collapse until the inward force of gravity is balanced by the outward pressure from the core. The star is now on the main sequence. • More massive stars follow the same process, ...
Chapter 13
... 1. The observed dark areas in the sky are caused by giant clouds of interstellar dust that block light from stars behind them. 2. In the 1930s, astronomers became aware that grains of dust exist throughout space. Interstellar cirrus clouds are faint, diffuse dust clouds found throughout interstellar ...
... 1. The observed dark areas in the sky are caused by giant clouds of interstellar dust that block light from stars behind them. 2. In the 1930s, astronomers became aware that grains of dust exist throughout space. Interstellar cirrus clouds are faint, diffuse dust clouds found throughout interstellar ...
Stars
... mass white dwarfs undergoing nuclear fusion. This turns out to mean they are… • GREAT “standard candles” – objects of known luminosity, on which we can then use simple math to determine their distance. • So, any SN I and its host galaxy, we can find it’s distance, even out to the edge of the observa ...
... mass white dwarfs undergoing nuclear fusion. This turns out to mean they are… • GREAT “standard candles” – objects of known luminosity, on which we can then use simple math to determine their distance. • So, any SN I and its host galaxy, we can find it’s distance, even out to the edge of the observa ...
PH709-assn-answers
... Planetesimals form as dust/grains separate/diffuse from the gas, forming a denser dust disc near the mid-plane. Inelastic ollisions between grains are more common in this disc and sticking/coalescence occurs. Turbulence stirs up the gas increasing the collision rate OR Gravity becomes more important ...
... Planetesimals form as dust/grains separate/diffuse from the gas, forming a denser dust disc near the mid-plane. Inelastic ollisions between grains are more common in this disc and sticking/coalescence occurs. Turbulence stirs up the gas increasing the collision rate OR Gravity becomes more important ...
Kepler Team Finds System with Two Potentially Habitable Planets
... “These planets are unlike anything in our solar system. They have endless oceans,” said lead author Lisa Kaltenegger of the Max Planck Institute for Astronomy and the Harvard Smithsonian Center for Astrophysics. “There may be life there, but could it be technology-based like ours? Life on these worl ...
... “These planets are unlike anything in our solar system. They have endless oceans,” said lead author Lisa Kaltenegger of the Max Planck Institute for Astronomy and the Harvard Smithsonian Center for Astrophysics. “There may be life there, but could it be technology-based like ours? Life on these worl ...
SIM-Jansky - Caltech Astronomy
... Eccentric orbits are common: scattering? – Several multiple systems of giant planets are known – Mass distribution extends below Saturn mass – Giant-Planet occurrence is high: ~7% ...
... Eccentric orbits are common: scattering? – Several multiple systems of giant planets are known – Mass distribution extends below Saturn mass – Giant-Planet occurrence is high: ~7% ...
News Release - האוניברסיטה העברית
... and in large quantities at such an early stage without massive galactic mergers. In the article published in Nature, Prof. Dekel and his Hebrew University and French associates, pose their new theoretical model, which explains these observed phenomena. Their findings are based on computer simulation ...
... and in large quantities at such an early stage without massive galactic mergers. In the article published in Nature, Prof. Dekel and his Hebrew University and French associates, pose their new theoretical model, which explains these observed phenomena. Their findings are based on computer simulation ...
Lecture PowerPoint
... –To provide data on possible platforms for astrobiology beyond our Solar System These imply study of terrestrial planets in the habitable zones of solar-type stars… ...
... –To provide data on possible platforms for astrobiology beyond our Solar System These imply study of terrestrial planets in the habitable zones of solar-type stars… ...