November 2013 - Pomona Valley Amateur Astronomers
... Next fall PVAA will try out a new dark sky site, Hard Luck Mine, Nevada. This site is about 22 miles northeast of Mesquite Spring Campground in Death Valley. The elevation at the Hard Luck Mine site is just over 6,000 feet. This will be one of the darkest sites from which PVAA has observed. It might ...
... Next fall PVAA will try out a new dark sky site, Hard Luck Mine, Nevada. This site is about 22 miles northeast of Mesquite Spring Campground in Death Valley. The elevation at the Hard Luck Mine site is just over 6,000 feet. This will be one of the darkest sites from which PVAA has observed. It might ...
The Milky Way: Spiral galaxies:
... •! In denser regions of the ISM, collisions between atoms become frequent enough to form molecules. •! The most common molecule is H2, but since H2 is a symmetric molecule, it has no rotational quantum transitions. It is therefore extremely difficult to detect. •! As a tracer of H2, astronomers usua ...
... •! In denser regions of the ISM, collisions between atoms become frequent enough to form molecules. •! The most common molecule is H2, but since H2 is a symmetric molecule, it has no rotational quantum transitions. It is therefore extremely difficult to detect. •! As a tracer of H2, astronomers usua ...
Answer to question 1 - Northwestern University
... North Telescope on Mauna Kea Hawaii using the newly commissioned Gemini Multi-Object Spectrograph. To make the color image, three images were combined to make this red, green and blue composite. ...
... North Telescope on Mauna Kea Hawaii using the newly commissioned Gemini Multi-Object Spectrograph. To make the color image, three images were combined to make this red, green and blue composite. ...
Scale of the Cosmos ppt.
... The Universe- the largest SYSTEM What is the Universe? How large is the universe? How many galaxies are in the universe? ...
... The Universe- the largest SYSTEM What is the Universe? How large is the universe? How many galaxies are in the universe? ...
Chapter 28 – Stars and Galaxies
... There are millions of light years between galaxies Sun belongs to the Milky Way Galaxy which is a spiral galaxy Milky Way belongs to the Local Group of about 30 galaxies ...
... There are millions of light years between galaxies Sun belongs to the Milky Way Galaxy which is a spiral galaxy Milky Way belongs to the Local Group of about 30 galaxies ...
The Ultimate Tool of Astronomy: Telescopes
... properties (temperature, density), dynamics (motions, mass), distance of the sources ...
... properties (temperature, density), dynamics (motions, mass), distance of the sources ...
Unit 8 Chapter 26 Studying Space
... dish. In New Mexico there is an array of them able to act as one, the Very Large Array (VLA). This enables astronomers to hear radio waves from outer space (like the movie Contact). ...
... dish. In New Mexico there is an array of them able to act as one, the Very Large Array (VLA). This enables astronomers to hear radio waves from outer space (like the movie Contact). ...
the ELECTROMAGNETIC SPECTRUM / WAVE PROPERTIES
... objects, and for sun tanning • Sources: Ultra hot objects 5000°C or more, such as Stars ...
... objects, and for sun tanning • Sources: Ultra hot objects 5000°C or more, such as Stars ...
Galaxies - Mike Brotherton
... 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 ~ 2.6 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 ~ 2.6 million solar masses. ...
PRACTICE MINI-EXAM
... Hubble time = 1/H0 = 1.4 × 1010 years Hubble distance = c/H0 = 4300 Mpc Critical density = 10−26 kg/m3 ...
... Hubble time = 1/H0 = 1.4 × 1010 years Hubble distance = c/H0 = 4300 Mpc Critical density = 10−26 kg/m3 ...
the star
... in the sky has a white dwarf companion • Sirius A,B – At a distance of 8.60 light years Sirius A is the brightest star in the sky. Sirius B is a white dwarf ...
... in the sky has a white dwarf companion • Sirius A,B – At a distance of 8.60 light years Sirius A is the brightest star in the sky. Sirius B is a white dwarf ...
Chapter 8: Stars
... sequence for a long time, they don’t stay their forever. • Average stars like the Sun, become red giants and then white dwarfs. • Massive stars use their hydrogen much faster than stars like the sun do. ...
... sequence for a long time, they don’t stay their forever. • Average stars like the Sun, become red giants and then white dwarfs. • Massive stars use their hydrogen much faster than stars like the sun do. ...
Two-Gyro Performance, Scheduling and Acquisitions
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
Nonfiction Text Feature
... How Does the Text Feature Help You as a Reader? Special types in a nonfiction text, help to expand our vocabulary by using context clues or the glossary to define the word. According to the text, galaxies are huge swarms of stars in space. This is an important vocabulary word in the text because the ...
... How Does the Text Feature Help You as a Reader? Special types in a nonfiction text, help to expand our vocabulary by using context clues or the glossary to define the word. According to the text, galaxies are huge swarms of stars in space. This is an important vocabulary word in the text because the ...
Hubble`s Law is the relation between the recession velocity of a
... 3. Explain why there is less carbon in very distant stars than in nearby Population I stars. ...
... 3. Explain why there is less carbon in very distant stars than in nearby Population I stars. ...
Lecture Notes
... Spectra showed strong emission lines which were finally interpreted in 1963 as the Balmer series of hydrogen redshifted by a (then) unprecedented amount of 100 nm for 3C 273 (z = 0.16; d ' 650 Mpc). Well over 1000 Quasars (Quasi-stellar radio sources) have now been identified. It is accepted that t ...
... Spectra showed strong emission lines which were finally interpreted in 1963 as the Balmer series of hydrogen redshifted by a (then) unprecedented amount of 100 nm for 3C 273 (z = 0.16; d ' 650 Mpc). Well over 1000 Quasars (Quasi-stellar radio sources) have now been identified. It is accepted that t ...
GEARS Workshop Monday - Georgia Southern University
... The Chandra data shows bright X-ray sources in this field, most of which are young stars. In this image, red, green, and blue represent low, medium, and high energy X-rays. The Chandra data have been overlaid on the Hubble Space Telescope image to show the context of these X-ray data. Very few X-ray ...
... The Chandra data shows bright X-ray sources in this field, most of which are young stars. In this image, red, green, and blue represent low, medium, and high energy X-rays. The Chandra data have been overlaid on the Hubble Space Telescope image to show the context of these X-ray data. Very few X-ray ...
Draft Science Cases for KPAO
... The visible applications may be the strongest selling point for KPAO, because there is a “hard” limit at 120nm rms, which produces diffraction limited images in the red part of the visible spectrum. The cone effect on an 8 meter telescope with a single laser guide star produces 125nm of error. So a ...
... The visible applications may be the strongest selling point for KPAO, because there is a “hard” limit at 120nm rms, which produces diffraction limited images in the red part of the visible spectrum. The cone effect on an 8 meter telescope with a single laser guide star produces 125nm of error. So a ...
2. Velocity dispersions of galaxies
... X-ray measurements of hot intracluster gas correspond closely to Zwicky's observations of mass-to-light ratios for large clusters of nearly 10 to 1. Many of the experiments of the Chandra X-ray Observatory use this technique to independently determine the mass of clusters. ...
... X-ray measurements of hot intracluster gas correspond closely to Zwicky's observations of mass-to-light ratios for large clusters of nearly 10 to 1. Many of the experiments of the Chandra X-ray Observatory use this technique to independently determine the mass of clusters. ...
Infrared Instrumentation & Observing Techniques
... other galaxies at (angular & spectral) resolutions comparable with the work done in our own Galaxy ...
... other galaxies at (angular & spectral) resolutions comparable with the work done in our own Galaxy ...
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.