New Directions
... the Universe was not known He therefore looked at only stars in the MW and saw that there was no obvious expansion or contraction *With a nod to Dr. Barbara Ryden ...
... the Universe was not known He therefore looked at only stars in the MW and saw that there was no obvious expansion or contraction *With a nod to Dr. Barbara Ryden ...
here
... between nearby stars, such as those in the same spiral arm or globular cluster. For example ...
... between nearby stars, such as those in the same spiral arm or globular cluster. For example ...
Structure of the solar system
... When two stars can not be seen but can be inferred due to the shift in their spectral lines. As one star (B) is moving away from Earth, its spectral lines (or absorption lines) will be red-shifted. As the other star is moving towards Earth (A), its lines will be blue-shifted. As they two stars are m ...
... When two stars can not be seen but can be inferred due to the shift in their spectral lines. As one star (B) is moving away from Earth, its spectral lines (or absorption lines) will be red-shifted. As the other star is moving towards Earth (A), its lines will be blue-shifted. As they two stars are m ...
Stars and Their Characteristics
... Black hole: The final life stage of an extremely massive star, with a gravitational field so intense that not even light can escape. Black holes are areas in space where there is a huge amount of mass in a very small space. The gravity of this mass is so great that everything in the area is pulled ...
... Black hole: The final life stage of an extremely massive star, with a gravitational field so intense that not even light can escape. Black holes are areas in space where there is a huge amount of mass in a very small space. The gravity of this mass is so great that everything in the area is pulled ...
Press release - ASTRONOMY GROUP – University of St Andrews
... He explained, “These Cepheids stars which get brighter and fainter by some tens of percent every ten to a hundred days are mostly understood. But recently it has become clear that our theories of what happens in the outer layers of these stars which cause the variations in brightness do not totally ...
... He explained, “These Cepheids stars which get brighter and fainter by some tens of percent every ten to a hundred days are mostly understood. But recently it has become clear that our theories of what happens in the outer layers of these stars which cause the variations in brightness do not totally ...
Document
... between yearly epochs at the 5 level with the CFHT Legacy Survey optical catalog. • Rule out sources with optical hosts with the colors and morphology of a star or quasar. • Follow up galaxy hosts that do not have an hard X-ray detection with optical spectroscopy to look for signs of an AGN. • Trig ...
... between yearly epochs at the 5 level with the CFHT Legacy Survey optical catalog. • Rule out sources with optical hosts with the colors and morphology of a star or quasar. • Follow up galaxy hosts that do not have an hard X-ray detection with optical spectroscopy to look for signs of an AGN. • Trig ...
Astronomical Distances
... stars or galaxies, you often see light years used as a unit of distance. Our nearest star is 4.2 light years away. So how far away is 1 light year? It refers to the distance that a photon of light travels in a 1 year period. The speed of light is 300,000km per second, or 1,080 million km per hour (a ...
... stars or galaxies, you often see light years used as a unit of distance. Our nearest star is 4.2 light years away. So how far away is 1 light year? It refers to the distance that a photon of light travels in a 1 year period. The speed of light is 300,000km per second, or 1,080 million km per hour (a ...
Name - MIT
... 30) Why can the Hubble Telescope observe fainter galaxies than can be observed on Earth? A) the Hubble Telescope is closer to the galaxies B) the Hubble Telescope can observe gamma rays C) the Hubble Telescope can observe X-rays D) the Hubble Telescope can observe radio waves E) the Hubble Telescope ...
... 30) Why can the Hubble Telescope observe fainter galaxies than can be observed on Earth? A) the Hubble Telescope is closer to the galaxies B) the Hubble Telescope can observe gamma rays C) the Hubble Telescope can observe X-rays D) the Hubble Telescope can observe radio waves E) the Hubble Telescope ...
How Do Astronomers Gather Information About
... How Do Astronomers Gather Information About Space? Most of the information we have about the universe comes from ____________. Objects in the universe, such as _____________________, emit radiation. This radiation travels in the form of ____________. Different kinds of radiation have differing _____ ...
... How Do Astronomers Gather Information About Space? Most of the information we have about the universe comes from ____________. Objects in the universe, such as _____________________, emit radiation. This radiation travels in the form of ____________. Different kinds of radiation have differing _____ ...
Name
... No notes, No books; You can use calculators The letter at the top of the test needs to correspond to letter at top of the answer sheet. Constants that you may need to know: • c = 3 x 108 m/s • G = 6.67 x 10-11 m3/(kg-s2) • h = 6.626 x 10-34 J-s • g = 9.8 m/s2 • σ = 5.7 x 10-8 W/(m2-K4) • 1 parsec = ...
... No notes, No books; You can use calculators The letter at the top of the test needs to correspond to letter at top of the answer sheet. Constants that you may need to know: • c = 3 x 108 m/s • G = 6.67 x 10-11 m3/(kg-s2) • h = 6.626 x 10-34 J-s • g = 9.8 m/s2 • σ = 5.7 x 10-8 W/(m2-K4) • 1 parsec = ...
Astronomy
... Reflection nebulae are associated with the gas and dust surrounding young stars such as the Pleiades. Emission nebulae glow. Dark and absorption nebulae are dark and absorb light. The reddish cloud of gas in the Horsehead Nebulae in Orion is emission nebulae. The horsehead is an absorption nebula. T ...
... Reflection nebulae are associated with the gas and dust surrounding young stars such as the Pleiades. Emission nebulae glow. Dark and absorption nebulae are dark and absorb light. The reddish cloud of gas in the Horsehead Nebulae in Orion is emission nebulae. The horsehead is an absorption nebula. T ...
Why Study Cosmic Near Infrared Background? (1-4um)
... Did these early stars that are responsible for the near infrared background overenrich the metals in the universe too early? ...
... Did these early stars that are responsible for the near infrared background overenrich the metals in the universe too early? ...
answers
... distant objects ever found. All of the objects are galaxies of stars except for E, which is a single nearby star. Which object is more luminous? A) E B) F C) they are about the same B) The two objects look equally bright, but are very different. The star is much closer and much less luminous. The ga ...
... distant objects ever found. All of the objects are galaxies of stars except for E, which is a single nearby star. Which object is more luminous? A) E B) F C) they are about the same B) The two objects look equally bright, but are very different. The star is much closer and much less luminous. The ga ...
Blurbs 4th six weeks Earth and Space Students identify the role of
... and other celestial objects took to form and by measuring speed at which galaxies are moving away from one another. Scientists use a variety of methods to study the origins of the universe, such as telescopes and maps of microwave radiation left over from the big bang. The big bang theory states tha ...
... and other celestial objects took to form and by measuring speed at which galaxies are moving away from one another. Scientists use a variety of methods to study the origins of the universe, such as telescopes and maps of microwave radiation left over from the big bang. The big bang theory states tha ...
High-Speed Ballistic Stellar Interlopers
... old. Only stars greater than 10 times the Sun’s mass have stellar winds throughout their entire lifetimes. But the objects observed by Hubble are not very massive, because they do not have glowing clouds of ionized gas around them. They are medium-sized stars that are a few to eight times more massi ...
... old. Only stars greater than 10 times the Sun’s mass have stellar winds throughout their entire lifetimes. But the objects observed by Hubble are not very massive, because they do not have glowing clouds of ionized gas around them. They are medium-sized stars that are a few to eight times more massi ...
PowerPoint File
... Measure the distance over which the density of stars significantly falls off with height above, or distance below, the galactic plane. The distance depends on the type of objects considered, but is roughly 100 – 200 parsecs. The galactic plane is much thinner than it is wide. ...
... Measure the distance over which the density of stars significantly falls off with height above, or distance below, the galactic plane. The distance depends on the type of objects considered, but is roughly 100 – 200 parsecs. The galactic plane is much thinner than it is wide. ...
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.