Lecture 2
... energy cannot last indefinitely. A star is radiating strongly and therefore loosing energy. If there were no input of energy available, the sun would cool in about 30 million years. In fact it will last much longer than that (it is about half way through its 10 billion year life) because it gets ene ...
... energy cannot last indefinitely. A star is radiating strongly and therefore loosing energy. If there were no input of energy available, the sun would cool in about 30 million years. In fact it will last much longer than that (it is about half way through its 10 billion year life) because it gets ene ...
Name: Notes – #6 Our Sky Through Binoculars and Telescopes 1
... 7. M31, the Andromeda Galaxy, is ___________________________ light years away. ...
... 7. M31, the Andromeda Galaxy, is ___________________________ light years away. ...
Interacting Galaxies
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
Linking Asteroids and Meteorites through Reflectance
... • At the dawn of the 20th century, most astronomers thought that the Milky Way Galaxy was the universe, and it measured only a few thousand light-years across. ...
... • At the dawn of the 20th century, most astronomers thought that the Milky Way Galaxy was the universe, and it measured only a few thousand light-years across. ...
Universal redshift, the Hubble constant The cosmic background
... In Gamow papers from 1940s this figure is quoted as the age of the Universe, with a disclaimer, it is probably underestimated. The age greater than 2 eons was given to the Earth from (nucleo-)geological investigations. ...
... In Gamow papers from 1940s this figure is quoted as the age of the Universe, with a disclaimer, it is probably underestimated. The age greater than 2 eons was given to the Earth from (nucleo-)geological investigations. ...
TF_final3 - Arecibo Observatory
... approximately 100 new stars per year. LIRGs are effect, the frequency scale of the spectrum was converted into velocity scale. The velocity width of the result of mix or collisions of galaxies. the line is related to the rotational speed of the HI Line : Neutral hydrogen in galaxies emit a line gala ...
... approximately 100 new stars per year. LIRGs are effect, the frequency scale of the spectrum was converted into velocity scale. The velocity width of the result of mix or collisions of galaxies. the line is related to the rotational speed of the HI Line : Neutral hydrogen in galaxies emit a line gala ...
Starbursts – from 30 Doradus to Lyman
... observational, points to an almost universal initial mass function for stars, at least at the highmass end, on scales from (super) star clusters to galaxies as a whole. A great deal of attention is being focused on the handful of situations (for example, star clusters in M82 and the Antennae galaxie ...
... observational, points to an almost universal initial mass function for stars, at least at the highmass end, on scales from (super) star clusters to galaxies as a whole. A great deal of attention is being focused on the handful of situations (for example, star clusters in M82 and the Antennae galaxie ...
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... of North America, the Crab Nebula would be approximately one quarter of a mile across and 160 miles away from our Solar System. The Crab Nebula is the remains of an exploded star that was once 8-12 times the mass of our Sun. Very massive stars end their lives in a gigantic explosion, known as a supe ...
... of North America, the Crab Nebula would be approximately one quarter of a mile across and 160 miles away from our Solar System. The Crab Nebula is the remains of an exploded star that was once 8-12 times the mass of our Sun. Very massive stars end their lives in a gigantic explosion, known as a supe ...
Light Energy, Dark Energy 1. Another View of Olber's Paradox
... meter of its surface. In comparison, how much energy per square meter does it receive from other stars? (Don't give a number, just compare.) The amount of light the Sun receives from other stars per square meter is comparable to the amount of light the Earth receives from other stars per square mete ...
... meter of its surface. In comparison, how much energy per square meter does it receive from other stars? (Don't give a number, just compare.) The amount of light the Sun receives from other stars per square meter is comparable to the amount of light the Earth receives from other stars per square mete ...
Galaxies
... How the Milky Way Formed? • The Milky Way system is a spiral galaxy consisting of over 400 billion stars, plus gas and dust arranged into three general components: – The halo: a roughly spherical distribution which contains the oldest stars in the Galaxy including Globular Clusters; – The nuclear b ...
... How the Milky Way Formed? • The Milky Way system is a spiral galaxy consisting of over 400 billion stars, plus gas and dust arranged into three general components: – The halo: a roughly spherical distribution which contains the oldest stars in the Galaxy including Globular Clusters; – The nuclear b ...
The James Webb Space Telescope: A Vision for the Future
... light it can collect. Webb will be able to see back to a few hundred million years after the Big Bang, when the very first stars and galaxies began to form. Hubble, which sees mostly in visible light and has the largest mirror currently in space, can see back to roughly 600 million years after the B ...
... light it can collect. Webb will be able to see back to a few hundred million years after the Big Bang, when the very first stars and galaxies began to form. Hubble, which sees mostly in visible light and has the largest mirror currently in space, can see back to roughly 600 million years after the B ...
Ch. 28 Test Topics
... -Know that the faster the source of light is moving the greater the shift of light. -Know that Edwin Hubble discovered that the farther away a galaxy was, the faster it was moving away from Earth. -Know the universe is continually expanding and how we know this. -Be able to describe the Big Bang the ...
... -Know that the faster the source of light is moving the greater the shift of light. -Know that Edwin Hubble discovered that the farther away a galaxy was, the faster it was moving away from Earth. -Know the universe is continually expanding and how we know this. -Be able to describe the Big Bang the ...
Lecture 31
... examined 3C273 (3C=Third Cambridge Catalog of Radio sources) and found its distance from its redshift to be 2 billion light years--not a star, and L = 1040 watts--1,000 L (MW)!! .8 to 14(?) Billion years--distance range. L = 1038-1042 watts. Energy comes from a region solar system-sized. Radio Jets. ...
... examined 3C273 (3C=Third Cambridge Catalog of Radio sources) and found its distance from its redshift to be 2 billion light years--not a star, and L = 1040 watts--1,000 L (MW)!! .8 to 14(?) Billion years--distance range. L = 1038-1042 watts. Energy comes from a region solar system-sized. Radio Jets. ...
Ch. 26.5: The Expanding Universe
... & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration due to gravity does not match up with the am ...
... & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration due to gravity does not match up with the am ...
Other Galaxies, their Distances, and the Expansion of the Universe
... Galaxies fill the Universe, and are visible at great distances. Each contains hundreds of millions of stars. They can be used to trace and derive properties of the Universe itself, such as whether it is a changing or unchanging structure, the speed of change, etc. ...
... Galaxies fill the Universe, and are visible at great distances. Each contains hundreds of millions of stars. They can be used to trace and derive properties of the Universe itself, such as whether it is a changing or unchanging structure, the speed of change, etc. ...
Eye on the Sky - Sci-Port
... sun’s core to release energy that eventually reaches Earth in the form of radiation. Sci-Port: Louisiana's Science Center ...
... sun’s core to release energy that eventually reaches Earth in the form of radiation. Sci-Port: Louisiana's Science Center ...
Review 1 Solutions
... 1. The night sky is mostly dark because we can only see stars within about 13.8 billion light years of us. T 2. The “rotation curves” that plot stars’ orbital speeds versus their distance from their galaxy’s center initially surprised astronomers by suggesting that large amounts of invisible matter ...
... 1. The night sky is mostly dark because we can only see stars within about 13.8 billion light years of us. T 2. The “rotation curves” that plot stars’ orbital speeds versus their distance from their galaxy’s center initially surprised astronomers by suggesting that large amounts of invisible matter ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.