Microsoft Word 97
... 3. What do we see when we look in the sky? _____________________________________________ 4. What does our galaxy look like from the top down? ______________________________________ 5. Where is Earth in the Milky Way? ____________________________________________________ 6. How long does it take for u ...
... 3. What do we see when we look in the sky? _____________________________________________ 4. What does our galaxy look like from the top down? ______________________________________ 5. Where is Earth in the Milky Way? ____________________________________________________ 6. How long does it take for u ...
Earth Science Fall Semester Exam
... • What are the characteristics of a dwarf planet? • It must have a spherical shape. • It has not cleared the neighborhood around its orbit (other objects are close indicating it doesn’t have enough mass to have the gravity necessary to pull it in to its mass). ...
... • What are the characteristics of a dwarf planet? • It must have a spherical shape. • It has not cleared the neighborhood around its orbit (other objects are close indicating it doesn’t have enough mass to have the gravity necessary to pull it in to its mass). ...
review
... Our Milky Way galaxy is disk shaped with a central bulge, and a low density spherical halo. Disk and halo are about 30kpc across. The central bulge is a few kpc across. There are about 1011 (100 billion) solar masses in the galaxy, so about that many stars. Measuring distances in the galaxy uses var ...
... Our Milky Way galaxy is disk shaped with a central bulge, and a low density spherical halo. Disk and halo are about 30kpc across. The central bulge is a few kpc across. There are about 1011 (100 billion) solar masses in the galaxy, so about that many stars. Measuring distances in the galaxy uses var ...
Stellar Properties
... 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. Apparent magnitude is measure of: a=light output, b=light received ...
... 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. Apparent magnitude is measure of: a=light output, b=light received ...
wk11
... • Highest temperature and lowest density of the three gaseous phases (hot, tenuous phase of the ISM): T ~ 103 to 106 K; n ~ 10-5 to 10-3 ions/cm3 • Weak degree of concentration to the plane of the Galactic disk: scale height z is a few kpc. Also seen in dense knots known as “HII regions” marking are ...
... • Highest temperature and lowest density of the three gaseous phases (hot, tenuous phase of the ISM): T ~ 103 to 106 K; n ~ 10-5 to 10-3 ions/cm3 • Weak degree of concentration to the plane of the Galactic disk: scale height z is a few kpc. Also seen in dense knots known as “HII regions” marking are ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
Neutron Star Formation
... • Gravitational mass determined by bounce – 1.01.5 solar masses • Gravitational mass determined by engine depends on the delay (the explosion energy is an indicator). • Fallback typically adds another >0.1 solar masses of material. • We can not match all the observations (the observations seem contr ...
... • Gravitational mass determined by bounce – 1.01.5 solar masses • Gravitational mass determined by engine depends on the delay (the explosion energy is an indicator). • Fallback typically adds another >0.1 solar masses of material. • We can not match all the observations (the observations seem contr ...
Stars: from Adolescence to Old Age
... shell burning: hydrogen shell surrounding the core ignites star expands and becomes a subgiant, then a red giant Stage 6: Helium Fusion helium fusion begins in the core star passes through a yellow giant phase equilibrates as a red giant or supergiant Stage 7: Stellar Nucleosynthesis – fusion of hea ...
... shell burning: hydrogen shell surrounding the core ignites star expands and becomes a subgiant, then a red giant Stage 6: Helium Fusion helium fusion begins in the core star passes through a yellow giant phase equilibrates as a red giant or supergiant Stage 7: Stellar Nucleosynthesis – fusion of hea ...
The “Life” of Non-living Stars - Etiwanda E
... The structure and composition of the universe can be learned by studying stars and galaxies and their evolution. Understanding the properties of stars provides us with an understanding of our sun, which is a star! The properties of the sun affect Earth directly, so it is important to know them. ...
... The structure and composition of the universe can be learned by studying stars and galaxies and their evolution. Understanding the properties of stars provides us with an understanding of our sun, which is a star! The properties of the sun affect Earth directly, so it is important to know them. ...
D1 Stellar quantities (PPT)
... ▪ Initially the cloud was about several light years across. A small overdensity in the cloud caused the contraction to begin and the overdensity to grow, thus producing a faster contraction ▪ Initially, most of the motions of the cloud particles were random, yet the nebula had a net rotation. As col ...
... ▪ Initially the cloud was about several light years across. A small overdensity in the cloud caused the contraction to begin and the overdensity to grow, thus producing a faster contraction ▪ Initially, most of the motions of the cloud particles were random, yet the nebula had a net rotation. As col ...
Lecture 39
... The energy released in the supernova is astounding. In its first 10 seconds, the 1987A supernova released more energy than the entire visible universe, and 100 times more energy than the Sun will release in its entire 10 billion year lifetime. The supernova begins with the collapse of the stellar co ...
... The energy released in the supernova is astounding. In its first 10 seconds, the 1987A supernova released more energy than the entire visible universe, and 100 times more energy than the Sun will release in its entire 10 billion year lifetime. The supernova begins with the collapse of the stellar co ...
The Milky Way Galaxy
... History of Galactic (& Extragalactic) Astronomy In 1920, the National Academy of Science hosted the Great Debate concerning the nature of the Spiral Nebulae: were they island universes outside of the Milky Way? •Shapley had MW size too big and therefore argued “NO”, they are part of the Milky Way • ...
... History of Galactic (& Extragalactic) Astronomy In 1920, the National Academy of Science hosted the Great Debate concerning the nature of the Spiral Nebulae: were they island universes outside of the Milky Way? •Shapley had MW size too big and therefore argued “NO”, they are part of the Milky Way • ...
MilkyWay
... History of Galactic (& Extragalactic) Astronomy In 1920, the National Academy of Science hosted the Great Debate concerning the nature of the Spiral Nebulae: were they island universes outside of the Milky Way? •Shapley had MW size too big and therefore argued “NO”, they are part of the Milky Way • ...
... History of Galactic (& Extragalactic) Astronomy In 1920, the National Academy of Science hosted the Great Debate concerning the nature of the Spiral Nebulae: were they island universes outside of the Milky Way? •Shapley had MW size too big and therefore argued “NO”, they are part of the Milky Way • ...
Powerpoint for today
... billion years ago. As Milky Way ages, the abundances of elements compared to H in gas and new stars are increasing due to fusion and supernovae. Elements up to iron (56Fe, 26 p + 30 n in nucleus) produced by steady fusion (less abundant elements we didn’t discuss, like Cl, Na, made in reactions that ...
... billion years ago. As Milky Way ages, the abundances of elements compared to H in gas and new stars are increasing due to fusion and supernovae. Elements up to iron (56Fe, 26 p + 30 n in nucleus) produced by steady fusion (less abundant elements we didn’t discuss, like Cl, Na, made in reactions that ...
Measuring Distance in our Universe. Due Tue 1 Dec 2009 Imagine
... Imagine that you could travel to the stars at the speed of light. It would take 8 minutes to get to the Sun from Earth. To get to the next nearest star, Proxima Centauri, it would take 4.2 years traveling at the speed of light. Distances on earth are often measured in kilometers but distances to the ...
... Imagine that you could travel to the stars at the speed of light. It would take 8 minutes to get to the Sun from Earth. To get to the next nearest star, Proxima Centauri, it would take 4.2 years traveling at the speed of light. Distances on earth are often measured in kilometers but distances to the ...
Gravitational waves and neutrino emission from the merger of
... ○ Gravitational waves ✓imprinting “raw” information of sources ✓extremely weak signal, hc∼10-22 = the change of (Size of H atoms)/(Distance to Sun) ...
... ○ Gravitational waves ✓imprinting “raw” information of sources ✓extremely weak signal, hc∼10-22 = the change of (Size of H atoms)/(Distance to Sun) ...
PH607 – Galaxies 2
... Galactic Nuclei (AGNs) such as Seyfert Galaxies and QSOs, we have speculated on whether the centre of our galaxy might contain a black hole ...
... Galactic Nuclei (AGNs) such as Seyfert Galaxies and QSOs, we have speculated on whether the centre of our galaxy might contain a black hole ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.