Exploring Space
... During a supernova remnants of stars 3X the size of the sun collapse into small dense objects (Black Holes) These black holes have gravitational energy so strong that even light cannot escape their surface How do we find them? ...
... During a supernova remnants of stars 3X the size of the sun collapse into small dense objects (Black Holes) These black holes have gravitational energy so strong that even light cannot escape their surface How do we find them? ...
Question 1 The star Regulus, in the constellation Leo, appears
... unit area varies with distance d according to which of the following laws (∝ means “proportional to”)? ...
... unit area varies with distance d according to which of the following laws (∝ means “proportional to”)? ...
astronomy timeline
... family farm. During this period he made fundamental discoveries in optics, discovered the law of universal gravitation, and invented differential and ...
... family farm. During this period he made fundamental discoveries in optics, discovered the law of universal gravitation, and invented differential and ...
Astronomy Chapter 17 – Galaxies A. Main Ideas 1. Discovering
... • Early Observations of Galaxies ⇒ All galaxies are extremely distant from Earth, the nearest is more than 150,000 light-year away. Few can be seen with the naked eye. In the Northern Hemisphere the galaxy M31 appears as a pale smudge in the constellation Andromeda. ⇒ In the 18th and 19 centuries as ...
... • Early Observations of Galaxies ⇒ All galaxies are extremely distant from Earth, the nearest is more than 150,000 light-year away. Few can be seen with the naked eye. In the Northern Hemisphere the galaxy M31 appears as a pale smudge in the constellation Andromeda. ⇒ In the 18th and 19 centuries as ...
The Milky Way and other Galaxies
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 4 million solar masses. ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 4 million solar masses. ...
The Search for Earth-Like Planets
... Premise: If there is intelligent life “out there”, it probably is similar to life as we know it on Earth. ...
... Premise: If there is intelligent life “out there”, it probably is similar to life as we know it on Earth. ...
Document
... the analysis of electromagnetic radiation reaching us from faraway objects. As the light travels from its source to us, it feels the effect of the expanding universe and its wavelength is stretched (redshifted). This stretching is larger the longer the photon needs to travel and the amount of stretc ...
... the analysis of electromagnetic radiation reaching us from faraway objects. As the light travels from its source to us, it feels the effect of the expanding universe and its wavelength is stretched (redshifted). This stretching is larger the longer the photon needs to travel and the amount of stretc ...
Chapter 18 review answers
... radio waves, microwaves, infrared, ultraviolet, xrays, and Gamma rays. 50. Scientists use special telescopes on the ground but primarily up in space to extract electromagnetic waves. They include ultraviolet telescopes, infrared telescopes, gamma-ray telescopes, and x-ray telescopes. They put these ...
... radio waves, microwaves, infrared, ultraviolet, xrays, and Gamma rays. 50. Scientists use special telescopes on the ground but primarily up in space to extract electromagnetic waves. They include ultraviolet telescopes, infrared telescopes, gamma-ray telescopes, and x-ray telescopes. They put these ...
Chapter 15 Stars, Galaxies
... but still high-mass stars become neutron stars. f. They all start out as a part of nebulas that contract to form protostars. g. Low-mass and medium-mass stars turn into red giants as they use up their fuel. They later form planetary nebulas and white dwarfs. High-mass stars turn into supergiants as ...
... but still high-mass stars become neutron stars. f. They all start out as a part of nebulas that contract to form protostars. g. Low-mass and medium-mass stars turn into red giants as they use up their fuel. They later form planetary nebulas and white dwarfs. High-mass stars turn into supergiants as ...
GCSE P1 1.5.4 Red shift
... after exploding suddenly in a Big Bang from a very small initial point, some 13.5 billion years ago. ...
... after exploding suddenly in a Big Bang from a very small initial point, some 13.5 billion years ago. ...
2.3 Peculiar galaxies
... Black hole accretion discs. If the available gas simply fell radially downwards towards the black hole, the energy it would gain would be kinetic energy, and it wouldn’t give much radiation; it would just disappear down the black hole. However, if, as is very likely, the gas is rotating around the b ...
... Black hole accretion discs. If the available gas simply fell radially downwards towards the black hole, the energy it would gain would be kinetic energy, and it wouldn’t give much radiation; it would just disappear down the black hole. However, if, as is very likely, the gas is rotating around the b ...
1. Compute the deflection angle of a star whose light... limb of the Sun. Also compute the deflection angle of...
... light just grazes the limb of a 1.4M neutron star, if the neutron star was at the same distance from the Earth as the Sun. State assumptions. 2. Use the Plummer potential model, with a value of a = 100 kpc, together with the Viral theorem to infer a value for galaxy masses in Fig. 7.3 assuming that ...
... light just grazes the limb of a 1.4M neutron star, if the neutron star was at the same distance from the Earth as the Sun. State assumptions. 2. Use the Plummer potential model, with a value of a = 100 kpc, together with the Viral theorem to infer a value for galaxy masses in Fig. 7.3 assuming that ...
origins of the Universe
... in the early 1900’s astronomers started to find evidence that pointed to a Big Bang. • In 1922, astronomer Edwin Hubble observed that the universe was expanding. The most distant galaxies he could see through his telescope were moving away at about 40 000 km per second. • This observation led to wha ...
... in the early 1900’s astronomers started to find evidence that pointed to a Big Bang. • In 1922, astronomer Edwin Hubble observed that the universe was expanding. The most distant galaxies he could see through his telescope were moving away at about 40 000 km per second. • This observation led to wha ...
PHYS 175 (2014) Final Examination Name: ___SOLUTION_____
... 31. [3 pts.] Briefly discuss the importance of the overlap in the distance ranges of the various techniques shown below in the “distance ladder”. ...
... 31. [3 pts.] Briefly discuss the importance of the overlap in the distance ranges of the various techniques shown below in the “distance ladder”. ...
Chapter 30 Review
... pulsation, astronomers can determine its luminosity and calculate how far away a variable star must be to appear as dim or as bright as it does. ...
... pulsation, astronomers can determine its luminosity and calculate how far away a variable star must be to appear as dim or as bright as it does. ...
Our Place in the Cosmos
... than the Earth, and the `superior’ ones outside the Earth’s orbit. Only planets out to Saturn were known at that time. The orbits were all taken as circular. ...
... than the Earth, and the `superior’ ones outside the Earth’s orbit. Only planets out to Saturn were known at that time. The orbits were all taken as circular. ...
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.