
Feb 2008 - Amateur Astronomers, Inc.
... Julius was born in March, 1920 in Transylvania which was originally a part of Hungary and is now in Romania. As a youth, he was greatly involved in school sports and he attended the so called Gymnasium in Hungary. At the outbreak of World War II, he was drafted into the Hungarian army then controlle ...
... Julius was born in March, 1920 in Transylvania which was originally a part of Hungary and is now in Romania. As a youth, he was greatly involved in school sports and he attended the so called Gymnasium in Hungary. At the outbreak of World War II, he was drafted into the Hungarian army then controlle ...
1 - UCSC Physics - University of California, Santa Cruz
... some of the most bizarre predictions of general relativity. The two pulsars in the J0737-3039 system are actually very far apart compared to their sizes. In a true scale model, if the pulsars were the sizes of marbles, they would be about 750 feet (225 meters) apart. Albert Einstein's 90-year-old ge ...
... some of the most bizarre predictions of general relativity. The two pulsars in the J0737-3039 system are actually very far apart compared to their sizes. In a true scale model, if the pulsars were the sizes of marbles, they would be about 750 feet (225 meters) apart. Albert Einstein's 90-year-old ge ...
Multiple Choice, continued
... main-sequence stage. During this stage, energy continues to be generated in the core of the star as hydrogen fuses into helium. • A star that has a mass about the same as the sun’s mass stays on the main sequence for about 10 billion years. • Scientists estimate that over a period of almost 5 billio ...
... main-sequence stage. During this stage, energy continues to be generated in the core of the star as hydrogen fuses into helium. • A star that has a mass about the same as the sun’s mass stays on the main sequence for about 10 billion years. • Scientists estimate that over a period of almost 5 billio ...
File
... main-sequence stage. During this stage, energy continues to be generated in the core of the star as hydrogen fuses into helium. • A star that has a mass about the same as the sun’s mass stays on the main sequence for about 10 billion years. • Scientists estimate that over a period of almost 5 billio ...
... main-sequence stage. During this stage, energy continues to be generated in the core of the star as hydrogen fuses into helium. • A star that has a mass about the same as the sun’s mass stays on the main sequence for about 10 billion years. • Scientists estimate that over a period of almost 5 billio ...
space - Net Start Class
... can travel in one Earth year, or 365 days. It is a measure of distance, not time. Key Concept 3: There is a time delay for images that are captured from objects in space because light takes time to travel. Depending on the distance of the object from the observer, by the time light enters through th ...
... can travel in one Earth year, or 365 days. It is a measure of distance, not time. Key Concept 3: There is a time delay for images that are captured from objects in space because light takes time to travel. Depending on the distance of the object from the observer, by the time light enters through th ...
A Zoo of Galaxies - Cambridge University Press
... to build the telescope, was to resolve structure in distant nebula to see if they could be “island universe”, rather similar in structure to our own galactic home. Today we have images of millions of galaxies from large surveys like the Sloan Digital Sky Survey (e.g. the last imaging release in Data ...
... to build the telescope, was to resolve structure in distant nebula to see if they could be “island universe”, rather similar in structure to our own galactic home. Today we have images of millions of galaxies from large surveys like the Sloan Digital Sky Survey (e.g. the last imaging release in Data ...
ASTR2100 - Saint Mary's University | Astronomy & Physics
... extinction in star count data, which was considered necessary at that time to resolve Herschel’s “infinite universe” with Olber’s paradox (which had been published in 1823). By the turn of the century many astronomers felt that a concerted, detailed effort should be made to establish reliable dimens ...
... extinction in star count data, which was considered necessary at that time to resolve Herschel’s “infinite universe” with Olber’s paradox (which had been published in 1823). By the turn of the century many astronomers felt that a concerted, detailed effort should be made to establish reliable dimens ...
Galaxy formation in the Planck cosmology - II. Star
... luminosities are computed by adding the flux in different bands throughout the time-evolution of each galaxy. This calculation generally requires interpolating between values in large stellar population synthesis tables and represents a large fraction, and in some cases the majority, of the computat ...
... luminosities are computed by adding the flux in different bands throughout the time-evolution of each galaxy. This calculation generally requires interpolating between values in large stellar population synthesis tables and represents a large fraction, and in some cases the majority, of the computat ...
Document
... Of these 184 are periodic comets (orbital periods less than 200 years); some of the remainder are no doubt periodic as well, but their orbits have not been determined with sufficient accuracy to tell for sure. ...
... Of these 184 are periodic comets (orbital periods less than 200 years); some of the remainder are no doubt periodic as well, but their orbits have not been determined with sufficient accuracy to tell for sure. ...
Astro 10B Study Questions for Each Chapter
... If you heat a gas which is sealed in a flexible balloon what will change? If something is coming toward/away from you is it red shifted or blue? If you heat a gas in a sealed rigid scuba tank what will change? Chapter 1. (skip most of this) Chapter 2 – Newton & Kepler’s Laws Kepler's first law (K1) ...
... If you heat a gas which is sealed in a flexible balloon what will change? If something is coming toward/away from you is it red shifted or blue? If you heat a gas in a sealed rigid scuba tank what will change? Chapter 1. (skip most of this) Chapter 2 – Newton & Kepler’s Laws Kepler's first law (K1) ...
PDF version (two pages, including the full text)
... Southern Cross and the Pointers (Alpha and Beta Centauri). Alpha Centauri is a triple system, with two sun like stars orbiting each other every 80 years and a dim red dwarf tagging along at a much larger distance. This star was discovered by Robert Innes at the Union Observatory in Johannesburg in 1 ...
... Southern Cross and the Pointers (Alpha and Beta Centauri). Alpha Centauri is a triple system, with two sun like stars orbiting each other every 80 years and a dim red dwarf tagging along at a much larger distance. This star was discovered by Robert Innes at the Union Observatory in Johannesburg in 1 ...
Homework
... universe is expanding. He was able to determine that fact by observing the speed and direction that galaxies are moving. Nearly all galaxies are moving away from our galaxy, and the more distant galaxies are moving away faster. That means that all of the galaxies in the universe (or at least the mat ...
... universe is expanding. He was able to determine that fact by observing the speed and direction that galaxies are moving. Nearly all galaxies are moving away from our galaxy, and the more distant galaxies are moving away faster. That means that all of the galaxies in the universe (or at least the mat ...
Local Group Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mario L Mateo
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
Final Exam: Chs 4-5, 12-17
... a. An excess of hydrogen atoms causes an explosion that crushes the star’s core. b. When the iron core becomes sufficiently massive, the electrons merge with protons to form neutrons, reducing core pressure and allowing it to collapse. c. As carbon builds up in the core, helium shell burning pushes ...
... a. An excess of hydrogen atoms causes an explosion that crushes the star’s core. b. When the iron core becomes sufficiently massive, the electrons merge with protons to form neutrons, reducing core pressure and allowing it to collapse. c. As carbon builds up in the core, helium shell burning pushes ...
The Milky Way * A Classic Galaxy
... How Did the Milky Way Form? • More on galaxy formation later, but briefly… • Gravity pulled together several, smaller “proto galaxies” which had already formed stars, and schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular mom ...
... How Did the Milky Way Form? • More on galaxy formation later, but briefly… • Gravity pulled together several, smaller “proto galaxies” which had already formed stars, and schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular mom ...
Presentation available here - Lunar and Planetary Institute
... All core collapse explosions are asymmetric, maybe produced by magnetic jets. How can this be proved? Gamma-ray bursts are caused by jets of material moving at nearly the speed of light. Do they mark the birth of black holes? At least some gamma-ray bursts (and maybe all) arise in supernova ex ...
... All core collapse explosions are asymmetric, maybe produced by magnetic jets. How can this be proved? Gamma-ray bursts are caused by jets of material moving at nearly the speed of light. Do they mark the birth of black holes? At least some gamma-ray bursts (and maybe all) arise in supernova ex ...
Physics-Y11-LP3 - All Saints` Catholic High School
... • recall that Cepheid variable stars pulse in brightness, with a period related to their luminosity • recall that and explain qualitatively how this relationship enables astronomers to estimate the distance to Cepheid variable stars • understand the role of observations of Cepheid variable stars in ...
... • recall that Cepheid variable stars pulse in brightness, with a period related to their luminosity • recall that and explain qualitatively how this relationship enables astronomers to estimate the distance to Cepheid variable stars • understand the role of observations of Cepheid variable stars in ...
7.1 What The Heavens Are Declaring About God`s
... When we look at a sky object one million light years away, the light we see has taken one million years to arrive which means what we are seeing is one million years old. By looking at similar galaxies at various distances from thousands to billions of light years, it is possible to look back in tim ...
... When we look at a sky object one million light years away, the light we see has taken one million years to arrive which means what we are seeing is one million years old. By looking at similar galaxies at various distances from thousands to billions of light years, it is possible to look back in tim ...
GEK - National University of Singapore
... star from the earth, and one way to do that is through this technique, called stellar parallax. a) Explain how this is done? Parallax is the apparent shift of a foreground object relative to some distant background as the observer’s point of view changes. Astronomers make use this trick as a measure ...
... star from the earth, and one way to do that is through this technique, called stellar parallax. a) Explain how this is done? Parallax is the apparent shift of a foreground object relative to some distant background as the observer’s point of view changes. Astronomers make use this trick as a measure ...
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.