Expanding Universe and Big Bang
... from 1912, made a series of astounding measurements which showed galaxies racing around the universe. The Andromeda galaxy was racing towards us at 300 km/s; but almost every other galaxy was racing away from the Milky Way. Slipher’s work would turn out to be vital evidence for the Big Bang theory. ...
... from 1912, made a series of astounding measurements which showed galaxies racing around the universe. The Andromeda galaxy was racing towards us at 300 km/s; but almost every other galaxy was racing away from the Milky Way. Slipher’s work would turn out to be vital evidence for the Big Bang theory. ...
Search For Dark Matters Essay Research Paper
... The way in which dark matter reveals its presence to us is through the gravitational effect it exerts on luminous matter in the universe. (\”Luminous\” matter is the matter we can see with our telescopes.) The most obvious example of the gravitational effects of dark matter can be observed when look ...
... The way in which dark matter reveals its presence to us is through the gravitational effect it exerts on luminous matter in the universe. (\”Luminous\” matter is the matter we can see with our telescopes.) The most obvious example of the gravitational effects of dark matter can be observed when look ...
Glossary - Royal Astronomical Society of Canada
... introduction of spurious colours by a lens, attenuated by the introduction of corrective elements into a compound lens ...
... introduction of spurious colours by a lens, attenuated by the introduction of corrective elements into a compound lens ...
Physics Revision Questions
... hydrogen) pulled together by gravity. Stage 2: Star (main sequence) - As the nebula grows the gravitational pull gets stronger and the pressure and the heat builds resulting in the formation of a star. Stage 3: Red giant - When most of the hydrogen has fused into helium the core collapses and the ou ...
... hydrogen) pulled together by gravity. Stage 2: Star (main sequence) - As the nebula grows the gravitational pull gets stronger and the pressure and the heat builds resulting in the formation of a star. Stage 3: Red giant - When most of the hydrogen has fused into helium the core collapses and the ou ...
81 KB - CSIRO Publishing
... discovered ultra-faint dwarf spheroidal (dSph) galaxies which contain very few stars, has motivated us to ask the question ‘What is a galaxy?’ Our aim here is to promote further discussion of how to define a galaxy and, in particular, what separates it from a star cluster. Like most previous definit ...
... discovered ultra-faint dwarf spheroidal (dSph) galaxies which contain very few stars, has motivated us to ask the question ‘What is a galaxy?’ Our aim here is to promote further discussion of how to define a galaxy and, in particular, what separates it from a star cluster. Like most previous definit ...
FINAL EXAM Name: ASTRONOMY II - 79202 Spring 1995
... to the known value of the sun’s age. Assume 1% efficiency to convert gravitational potential energy to luminosity. ...
... to the known value of the sun’s age. Assume 1% efficiency to convert gravitational potential energy to luminosity. ...
Document
... – Blue line is relative imaging quality (Q) Q=100 best possible from this site – Solid orange line is relative effective resolution quality ...
... – Blue line is relative imaging quality (Q) Q=100 best possible from this site – Solid orange line is relative effective resolution quality ...
Some Important Introductory Concepts
... Scientific notation; how to get used to units; distances, angles, These preliminaries are an important part of the course because if you don’t become comfortable with them, you may have difficulty reading the textbook and understanding the lecture material. There is also more here than meets the eye-- ...
... Scientific notation; how to get used to units; distances, angles, These preliminaries are an important part of the course because if you don’t become comfortable with them, you may have difficulty reading the textbook and understanding the lecture material. There is also more here than meets the eye-- ...
US - Real Science
... scattered around the arms. But astronomers simply __ not know what is compressing this gas so much ____ stars are forming at a staggering rate. Probing further into ___ 1313's interior reveals more mystery. In the midst of ___ starburst regions, two objects are emitting highly energetic X-rays. ____ ...
... scattered around the arms. But astronomers simply __ not know what is compressing this gas so much ____ stars are forming at a staggering rate. Probing further into ___ 1313's interior reveals more mystery. In the midst of ___ starburst regions, two objects are emitting highly energetic X-rays. ____ ...
Jan 2017 - Bays Mountain Park
... waxing crescent Moon sets before 10 p.m. providing clear, dark skies in the prime viewing predawn hours. The radiant for this shower is in the constellation of Boötes and rises before midnight climbing to 60 degrees as twilight approaches. The name of the shower comes from an old constellation calle ...
... waxing crescent Moon sets before 10 p.m. providing clear, dark skies in the prime viewing predawn hours. The radiant for this shower is in the constellation of Boötes and rises before midnight climbing to 60 degrees as twilight approaches. The name of the shower comes from an old constellation calle ...
distant stars nearby star parallax angle The principle of geometrical
... didn’t know the distances to these stars, we wouldn’t know that Betelgeuse is a red giant star, with a much greater intrinsic brightness than Vega (and much larger diameter). Nor would we know that many stars visible in the night sky are much like the Sun, but just much, much farther away so they ap ...
... didn’t know the distances to these stars, we wouldn’t know that Betelgeuse is a red giant star, with a much greater intrinsic brightness than Vega (and much larger diameter). Nor would we know that many stars visible in the night sky are much like the Sun, but just much, much farther away so they ap ...
Untitled - Kapteyn Astronomical Institute
... Two images of the Orion nebula, named after the constellation Orion. On the left is an image in visible light made by the Hubble space telescope and on the right is an image in infrared made by the Very Large Telescope. You can clearly see that in infrared one can peer through the dust clouds and se ...
... Two images of the Orion nebula, named after the constellation Orion. On the left is an image in visible light made by the Hubble space telescope and on the right is an image in infrared made by the Very Large Telescope. You can clearly see that in infrared one can peer through the dust clouds and se ...
AS1001:Extra-Galactic Astronomy Stars and Gas in Galaxies
... • Multiple images of some quasars. • Background sources are magnified and distorted by gravitational lensing as the light passes through an intervening galaxy or cluster of galaxies. ...
... • Multiple images of some quasars. • Background sources are magnified and distorted by gravitational lensing as the light passes through an intervening galaxy or cluster of galaxies. ...
Document
... • Measuring distances on Earth is easy. On galactic scales it’s a bit harder... • Hubble’s law relates distance to redshift, but how do you measure Hubbles constant? • There is no simple way to measure the distance to anywhere. Different indicators must be used for different distances • The ‘distanc ...
... • Measuring distances on Earth is easy. On galactic scales it’s a bit harder... • Hubble’s law relates distance to redshift, but how do you measure Hubbles constant? • There is no simple way to measure the distance to anywhere. Different indicators must be used for different distances • The ‘distanc ...
General Astrophysics And Comparative Planetology
... Earth-sized based only on visual observations and an assumed surface reflectance. This estimate was reduced when Pluto’s icy nature was guessed. Finally the Charon-Pluto eclipses during the late 1980s constrained Pluto’s radius to be much smaller—0.18 Earth radii. Sedna is a recently discovered smal ...
... Earth-sized based only on visual observations and an assumed surface reflectance. This estimate was reduced when Pluto’s icy nature was guessed. Finally the Charon-Pluto eclipses during the late 1980s constrained Pluto’s radius to be much smaller—0.18 Earth radii. Sedna is a recently discovered smal ...
talk / PPT / 1.6 MB
... Next comes infra-red (J, H, K) from 2MASS. Work in progress. Galactic chemical evolutionary models of Solar neighbourhood fit the data very well. Models gain street credit! Are there still at least as many baryons to be found in the Milky Way? ...
... Next comes infra-red (J, H, K) from 2MASS. Work in progress. Galactic chemical evolutionary models of Solar neighbourhood fit the data very well. Models gain street credit! Are there still at least as many baryons to be found in the Milky Way? ...
Newton`s laws of motion and gravity
... troughs = wavelength How many peaks or troughs pass by you per second? = frequency ...
... troughs = wavelength How many peaks or troughs pass by you per second? = frequency ...
Click here to get the file
... emission, absorption, or as a continuum. The introduction to this module describes the mechanisms for the production of the radio waves. Observations will be spectra of a radio emission line object, an absorption line object, and a continuum source. This module is different from the others in that i ...
... emission, absorption, or as a continuum. The introduction to this module describes the mechanisms for the production of the radio waves. Observations will be spectra of a radio emission line object, an absorption line object, and a continuum source. This module is different from the others in that i ...
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.