PHYS-4240 — General Relativity ASTR-4240 — Gravitation & Cosmology Spring, 2016 Class 1
... Milky Way (aka “the Galaxy”) reside in several different structural components. The Sun lies in a thin disk of stars and gas which orbit the center of the Galaxy and extend to several tens of kiloparsecs1 from the Galactic center. In this exercise we will model the thin disk as an infinite sheet of ...
... Milky Way (aka “the Galaxy”) reside in several different structural components. The Sun lies in a thin disk of stars and gas which orbit the center of the Galaxy and extend to several tens of kiloparsecs1 from the Galactic center. In this exercise we will model the thin disk as an infinite sheet of ...
Star Clusters, Galaxies, & Black Holes
... Stars do not occur in space at completely arbitrary places. Some, such as the Sun, are single (field star), but others are members of pairs or form multiple-star systems. Still others form clusters of various types, and size. All of them are condensed from clouds of gas and dust. ...
... Stars do not occur in space at completely arbitrary places. Some, such as the Sun, are single (field star), but others are members of pairs or form multiple-star systems. Still others form clusters of various types, and size. All of them are condensed from clouds of gas and dust. ...
Stellar Evolution
... Hubble’s system only based on appearance Now we know there are other differences Elliptical Galaxies: mostly old stars, very little gas and dust Spiral Galaxies: mixture of young and old stars, lots of gas & dust so new stars ...
... Hubble’s system only based on appearance Now we know there are other differences Elliptical Galaxies: mostly old stars, very little gas and dust Spiral Galaxies: mixture of young and old stars, lots of gas & dust so new stars ...
The Discovery of Galaxies
... - elliptical (like a football) - spiral (like a pinwheel) - irregular (like something not regular…) ...
... - elliptical (like a football) - spiral (like a pinwheel) - irregular (like something not regular…) ...
Milky Way Galaxy Notes Outline
... Apparent brightness is directly proportional to _________________ and inversely proportional to __________________. Where are most RR Lyrae stars located? ...
... Apparent brightness is directly proportional to _________________ and inversely proportional to __________________. Where are most RR Lyrae stars located? ...
Galaxy Hunt Assignment.
... 2. The galaxy we live in is called the Milky Way. Using the Internet or other resources, research answers to the following questions. ...
... 2. The galaxy we live in is called the Milky Way. Using the Internet or other resources, research answers to the following questions. ...
20.2 The Milky Way and Other Galaxies
... -RECOGNIZE THAT AT THE CENTER OF THE MILKY WAY THERE IS A BULGE STARS, FROM WHICH ARE SPIRAL ARMS OF GAS, DUST AND MOST OF THE YOUNG STARS. -RECOGNIZE THAT THE SOLAR SYSTEM IS PART OF THE MILKY WAY GALAXY. K -DEMONSTRATE THAT HUBBLE’S LAW THAT GALAXIES THAT ARE FARTHER AWAY HAVE A GREATER RED SHIFT, ...
... -RECOGNIZE THAT AT THE CENTER OF THE MILKY WAY THERE IS A BULGE STARS, FROM WHICH ARE SPIRAL ARMS OF GAS, DUST AND MOST OF THE YOUNG STARS. -RECOGNIZE THAT THE SOLAR SYSTEM IS PART OF THE MILKY WAY GALAXY. K -DEMONSTRATE THAT HUBBLE’S LAW THAT GALAXIES THAT ARE FARTHER AWAY HAVE A GREATER RED SHIFT, ...
The Milky Way - Zumbroclassroom
... ________ light ________ in a _______. Our solar system is a tiny speck, located on an outer arm of the galaxy called _________________. We orbit the center of the Milky way, at a rate of_____________ miles per __________. It would still take us a very long time to complete one rotation. Scientists u ...
... ________ light ________ in a _______. Our solar system is a tiny speck, located on an outer arm of the galaxy called _________________. We orbit the center of the Milky way, at a rate of_____________ miles per __________. It would still take us a very long time to complete one rotation. Scientists u ...
Milky Way
The Milky Way is the galaxy that contains our Solar System. Its name ""milky"" is derived from its appearance as a dim glowing band arching across the night sky whose individual stars cannot be distinguished by the naked eye. The term ""Milky Way"" is a translation of the Latin via lactea, from the Greek γαλαξίας κύκλος (galaxías kýklos, ""milky circle""). From Earth the Milky Way appears as a band because its disk-shaped structure is viewed from within. Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610. Until the early 1920s most astronomers thought that the Milky Way contained all the stars in the Universe. Following the 1920 Great Debate between the astronomers Harlow Shapley and Heber Curtis, observations by Edwin Hubble showed that the Milky Way is just one of many galaxies—now known to number in the billions.The Milky Way is a barred spiral galaxy that has a diameter usually considered to be roughly 100,000–120,000 light-years but may be 150,000–180,000 light-years. The Milky Way is estimated to contain 100–400 billion stars, although this number may be as high as one trillion. There are probably at least 100 billion planets in the Milky Way. The Solar System is located within the disk, about 27,000 light-years from the Galactic Center, on the inner edge of one of the spiral-shaped concentrations of gas and dust called the Orion Arm. The stars in the inner ≈10,000 light-years form a bulge and one or more bars that radiate from the bulge. The very center is marked by an intense radio source, named Sagittarius A*, which is likely to be a supermassive black hole.Stars and gases at a wide range of distances from the Galactic Center orbit at approximately 220 kilometers per second. The constant rotation speed contradicts the laws of Keplerian dynamics and suggests that much of the mass of the Milky Way does not emit or absorb electromagnetic radiation. This mass has been given the name ""dark matter"". The rotational period is about 240 million years at the position of the Sun. The Milky Way as a whole is moving at a velocity of approximately 600 km per second with respect to extragalactic frames of reference. The oldest stars in the Milky Way are nearly as old as the Universe itself and thus must have formed shortly after the Big Bang.The Milky Way has several satellite galaxies and is part of the Local Group of galaxies, which is a component of the Virgo Supercluster, which again is a component of the Laniakea Supercluster.