AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University
... Explanation: Yes it does look like Saturn, but Saturn is only one of four giant ringed planets in our Solar System. And while Saturn has the brightest rings, this system of rings and moons actually belongs to planet Uranus, imaged here in near-infrared light by the Antu telescope at the ESO Paranal ...
... Explanation: Yes it does look like Saturn, but Saturn is only one of four giant ringed planets in our Solar System. And while Saturn has the brightest rings, this system of rings and moons actually belongs to planet Uranus, imaged here in near-infrared light by the Antu telescope at the ESO Paranal ...
starevolution - Global Change Program
... weight of about 4). To make one He atom, we therefore need four H atoms and some modifications. Assuming we are able to overcome the repelling force of the protons, the combined mass of 4 H atoms equals 6.696E-24gram, which exceeds the mass of He. The excess mass is released as energy following Albe ...
... weight of about 4). To make one He atom, we therefore need four H atoms and some modifications. Assuming we are able to overcome the repelling force of the protons, the combined mass of 4 H atoms equals 6.696E-24gram, which exceeds the mass of He. The excess mass is released as energy following Albe ...
Galaxies Galore
... 11. The farther a galaxy is from Earth, the ___________ it is moving ___________ from us. 12. How high does the Hubble Space Telescope orbit the Earth? ______________ 13. How many different cameras does HST contain? _______________ 14. The Hubble Deep Fields (North and South) each look at an area of ...
... 11. The farther a galaxy is from Earth, the ___________ it is moving ___________ from us. 12. How high does the Hubble Space Telescope orbit the Earth? ______________ 13. How many different cameras does HST contain? _______________ 14. The Hubble Deep Fields (North and South) each look at an area of ...
Astronomy Midterm Review Sheet
... 56. Which of the following describes Tycho’s model of the solar system? a. Sun orbits Earth, planets orbit the Sun c. Earth orbits Sun, planets orbit Earth b. Sun and planets orbit Earth d. Planets and Earth orbit Sun 57. Which of the following is one of Kepler’s Laws of Planetary Motion? a. The pla ...
... 56. Which of the following describes Tycho’s model of the solar system? a. Sun orbits Earth, planets orbit the Sun c. Earth orbits Sun, planets orbit Earth b. Sun and planets orbit Earth d. Planets and Earth orbit Sun 57. Which of the following is one of Kepler’s Laws of Planetary Motion? a. The pla ...
etlife_douglas_ewart_short
... Star + planet orbit about centre of gravity We can also see the motion of the star from its spectral lines. ...
... Star + planet orbit about centre of gravity We can also see the motion of the star from its spectral lines. ...
Distances
... in star clusters), the absolute distance to a pulsating variable star can be estimated by the BaadeWesselink method. This technique employs high-resolution spectroscopy to measure the variation of a star’s radial velocity as it expands and contracts. The time integral of the velocity gives the absol ...
... in star clusters), the absolute distance to a pulsating variable star can be estimated by the BaadeWesselink method. This technique employs high-resolution spectroscopy to measure the variation of a star’s radial velocity as it expands and contracts. The time integral of the velocity gives the absol ...
Consider Average Stars
... We now do better than the Greeks, measuring star brightnesses very precisely – so there are, for example, stars of magnitude 2.50, or 3.75. They are not merely put into ‘groups.’ Here are some real examples: ...
... We now do better than the Greeks, measuring star brightnesses very precisely – so there are, for example, stars of magnitude 2.50, or 3.75. They are not merely put into ‘groups.’ Here are some real examples: ...
AS2001
... • Q4: Name and describe three effects that give rise to anisotropy in the Cosmic Microwave Background, indicating which are most important on angular scales of 10, 1 and 0.1 degrees. • 10o Sachs-Wolf effect - photons last scattered from higher-density regions lose energy climbing out of the potenti ...
... • Q4: Name and describe three effects that give rise to anisotropy in the Cosmic Microwave Background, indicating which are most important on angular scales of 10, 1 and 0.1 degrees. • 10o Sachs-Wolf effect - photons last scattered from higher-density regions lose energy climbing out of the potenti ...
The Spatially-Resolved Scaling Law of Star Formation
... gravitation with the following statements: – Every mass attracts every other mass through the force of gravity. – If mass #1 exerts force on mass #2, and mass#2 exerts force on mass#1, the force must depend o both ...
... gravitation with the following statements: – Every mass attracts every other mass through the force of gravity. – If mass #1 exerts force on mass #2, and mass#2 exerts force on mass#1, the force must depend o both ...
Life Cycle of Stars - Lab Science Schedule
... Life Cycle of Stars Most astronomers agree that stars are born within nebulae, or huge clouds of dust and gases. The main factor that shapes the life cycles of a star is the star’s starting mass. Medium-sized stars pass through a red-giant stage before they become white dwarfs and die. The core of t ...
... Life Cycle of Stars Most astronomers agree that stars are born within nebulae, or huge clouds of dust and gases. The main factor that shapes the life cycles of a star is the star’s starting mass. Medium-sized stars pass through a red-giant stage before they become white dwarfs and die. The core of t ...
slides
... Can we see all of the Milky way galaxy from the Earth? What is the reason we see Milky way as a luminous cloud? What is most distant object in the universe can be seen with the unaided eye? What are the dark areas in the Milky way, devoid of any stars? What are the Magellanic clouds? Are they visibl ...
... Can we see all of the Milky way galaxy from the Earth? What is the reason we see Milky way as a luminous cloud? What is most distant object in the universe can be seen with the unaided eye? What are the dark areas in the Milky way, devoid of any stars? What are the Magellanic clouds? Are they visibl ...
09astrophysics_2007Nov
... 3b. Inverse Square Law •Apparent Luminosity drops off inversely proportional to squared distance. •Sun at 100 parsecs away (10x standard) would appear 1/100 as bright. •A factor of 100 is 5 ...
... 3b. Inverse Square Law •Apparent Luminosity drops off inversely proportional to squared distance. •Sun at 100 parsecs away (10x standard) would appear 1/100 as bright. •A factor of 100 is 5 ...
Galaxy Formation,! Reionization, ! the First Stars and Quasars! Ay 127!
... Population III Stars! • They may have formed in large numbers as early as z ~ 20 - 30, and (partly?) reionized the universe, as WMAP data indicate! • However, their feedback may have extinguished the star formation in their hosts, possibly leading to a (partial?) ...
... Population III Stars! • They may have formed in large numbers as early as z ~ 20 - 30, and (partly?) reionized the universe, as WMAP data indicate! • However, their feedback may have extinguished the star formation in their hosts, possibly leading to a (partial?) ...
Space Trivia Questions - Trivia Questions World
... galaxy is bound by gravity and consists of stars, dust, interstellar gas, and dark matter. They range in size from a few billion stars to one hundred trillion stars. The oldest and most distant observed galaxy is actually 32 billion light years from Earth and is located in the constellation Ursa Maj ...
... galaxy is bound by gravity and consists of stars, dust, interstellar gas, and dark matter. They range in size from a few billion stars to one hundred trillion stars. The oldest and most distant observed galaxy is actually 32 billion light years from Earth and is located in the constellation Ursa Maj ...
Lesson 2 Power Notes Outline
... Energy is transferred from the sun’s core to the photosphere and escapes into space as visible light, other forms of radiation, heat, and wind. ...
... Energy is transferred from the sun’s core to the photosphere and escapes into space as visible light, other forms of radiation, heat, and wind. ...
Integrative Studies 410 Our Place in the Universe
... What can we conclude from observing patterns in the sky? • Earth OR Celestial Sphere rotates • Earth rotates around the Sun OR Sun moves about Earth • Moon rotates around the Earth or v.v.? – Must be former, due to moon phases observed! ...
... What can we conclude from observing patterns in the sky? • Earth OR Celestial Sphere rotates • Earth rotates around the Sun OR Sun moves about Earth • Moon rotates around the Earth or v.v.? – Must be former, due to moon phases observed! ...
presentation02 - School of Physical Sciences
... 1039 times larger than gravity. Fortunately the number of protons equals the number of electrons in the universe. If this were not true, the repulsion between the excess protons (or excess electrons) would overwhelm gravity and there would be no stars, or planets, or galaxies. ...
... 1039 times larger than gravity. Fortunately the number of protons equals the number of electrons in the universe. If this were not true, the repulsion between the excess protons (or excess electrons) would overwhelm gravity and there would be no stars, or planets, or galaxies. ...
WebQuest-The-Life-Cycle-of-Stars-1
... and see pictures of the protostars of M16: The Eagle Nebula and other nebulae on this page. Continue by reading up on Main Sequence Stars and find out how our sun compares in mass to other stars. 1) Compare the mass of our sun to Sirius? To Proxima Centauri? 2) Based on its mass, will our sun be aro ...
... and see pictures of the protostars of M16: The Eagle Nebula and other nebulae on this page. Continue by reading up on Main Sequence Stars and find out how our sun compares in mass to other stars. 1) Compare the mass of our sun to Sirius? To Proxima Centauri? 2) Based on its mass, will our sun be aro ...
2 Inch Universe Analogies
... (220,000 LY) Shrink the “continent-size Milky Way” down to 2inches QUESTION: If Milky Way is 2-inches big, what is the distance between these two galaxies? ...
... (220,000 LY) Shrink the “continent-size Milky Way” down to 2inches QUESTION: If Milky Way is 2-inches big, what is the distance between these two galaxies? ...
Powerpoint for today
... 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 likely it's a dark halo surrounding the Milky Way. ...
... 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 likely it's a dark halo surrounding the Milky Way. ...
Stars
... star, you can refer to its absolute magnitude or apparent magnitude. • Absolute magnitude is a measure of the amount of light it gives off. • Apparent magnitude is a measure of the amount of light received on Earth. • A star that’s dim can appear bright if it’s close to Earth, and a star that is bri ...
... star, you can refer to its absolute magnitude or apparent magnitude. • Absolute magnitude is a measure of the amount of light it gives off. • Apparent magnitude is a measure of the amount of light received on Earth. • A star that’s dim can appear bright if it’s close to Earth, and a star that is bri ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.