Deep Space (PDF: 224k)
... during its entire lifetime! This is a supernova explosion that expels material at 10 percent the speed of light and leaves behind a black hole. Stars with initial masses between eight and 50 times that of the Sun do not evolve to the Wolf-Rayet stage; they never completely lose the hydrogen in their ...
... during its entire lifetime! This is a supernova explosion that expels material at 10 percent the speed of light and leaves behind a black hole. Stars with initial masses between eight and 50 times that of the Sun do not evolve to the Wolf-Rayet stage; they never completely lose the hydrogen in their ...
Observations of V838 Mon light echo
... Evolutionary tracks from Schaller et al. (1992), Y=0.300, Z=0.020. ...
... Evolutionary tracks from Schaller et al. (1992), Y=0.300, Z=0.020. ...
File
... like it did at the horizontal branch phase, it would eventually heat up and fuse the carbon and oxygen. • But for stars with masses less than 4 times solar a property called electron degeneracy kicks in. • The white dwarf acts like a giant atom with electrons in unique energy states. – This keeps th ...
... like it did at the horizontal branch phase, it would eventually heat up and fuse the carbon and oxygen. • But for stars with masses less than 4 times solar a property called electron degeneracy kicks in. • The white dwarf acts like a giant atom with electrons in unique energy states. – This keeps th ...
Stars - MrCrabtreesScience
... How Far? • Parallax – The apparent movement of an object seen at different viewpoints. – The more the object moves (the greater the parallax), the closer it is. – The Hipparcos satellite ...
... How Far? • Parallax – The apparent movement of an object seen at different viewpoints. – The more the object moves (the greater the parallax), the closer it is. – The Hipparcos satellite ...
Stellar Luminosities
... Luminosity of the Sun • Another way to look at this is to measure the amount of energy in sunlight falling on a unit surface area, then multiply by the number of unit areas on the surface of a sphere with a radius of 1 `AU’. • One measure of the Sun’s apparent brightness is the `Solar Constant’: 1. ...
... Luminosity of the Sun • Another way to look at this is to measure the amount of energy in sunlight falling on a unit surface area, then multiply by the number of unit areas on the surface of a sphere with a radius of 1 `AU’. • One measure of the Sun’s apparent brightness is the `Solar Constant’: 1. ...
2015 Final Semester Exam Review
... 9. A sequence of star colors from hottest to coolest is ________________________________. 10. A measure of the amount of the light given off by a star is its ___________________________. 11. A measure of the amount of light received on Earth is a star's ____________________________. 12. The process ...
... 9. A sequence of star colors from hottest to coolest is ________________________________. 10. A measure of the amount of the light given off by a star is its ___________________________. 11. A measure of the amount of light received on Earth is a star's ____________________________. 12. The process ...
Octobers Meeting - Tauranga Astronomical Society
... It was probably a pile of space rubble – like the asteroid Mathilde. It would appear not to be an iron based asteroid because of the lack of a crater, no tektites – small molten objects ejected from impact material. The asteroid was reported as visible over East Asia, China. Had it arrived 4 hours l ...
... It was probably a pile of space rubble – like the asteroid Mathilde. It would appear not to be an iron based asteroid because of the lack of a crater, no tektites – small molten objects ejected from impact material. The asteroid was reported as visible over East Asia, China. Had it arrived 4 hours l ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
... 1.38 10-23 J K-1 mass of electron 9.11 10-31 kg mass of hydrogen atom 1.67 10-27 kg ...
... 1.38 10-23 J K-1 mass of electron 9.11 10-31 kg mass of hydrogen atom 1.67 10-27 kg ...
G-stars - Gemini Astronomie
... Capella (Alpha Aurigae) belongs to the giant stars. It is the brightest star in Auriga and the sixth brightest in the whole sky. It is a double star, either one belonging to the spectral classes G8III and G0III with roughly the same temperature as the Sun (5,600K), a radius of about 10 times that of ...
... Capella (Alpha Aurigae) belongs to the giant stars. It is the brightest star in Auriga and the sixth brightest in the whole sky. It is a double star, either one belonging to the spectral classes G8III and G0III with roughly the same temperature as the Sun (5,600K), a radius of about 10 times that of ...
Assignment 7 - Department of Physics and Astronomy
... d. a white dwarf e. an Mtype star ____ 32. The apparent brightness of stars in general tells us nothing about their distances (i.e. we cannot assume that the dimmer stars are farther away.) In order for the apparent brightness of a star to be a good indicator of its distance, all the stars would ...
... d. a white dwarf e. an Mtype star ____ 32. The apparent brightness of stars in general tells us nothing about their distances (i.e. we cannot assume that the dimmer stars are farther away.) In order for the apparent brightness of a star to be a good indicator of its distance, all the stars would ...
Friday, April 25 - Otterbein University
... • Appears as a milky band of light across the sky • A small telescope reveals that it is composed of many stars (Galileo again!) • Our knowledge of the Milky Way comes from a combination of observation and comparison to other ...
... • Appears as a milky band of light across the sky • A small telescope reveals that it is composed of many stars (Galileo again!) • Our knowledge of the Milky Way comes from a combination of observation and comparison to other ...
Cosmic context: stars and formation of heavy elements
... Endpoint of such stars is a planetary nebula and a white dwarf: ...
... Endpoint of such stars is a planetary nebula and a white dwarf: ...
What do we mean by habitable zone?
... (373/288)−2 ×1 AU= 0.6 AU to (273/288)−1 ×1 AU= 1.1 AU. In principle this would include Venus but not Mars. As an indication of how different assumptions can change the range, I have also seen ranges such as 0.95 AU to 1.37 AU for the habitable zone. It’s not exact. One reason is that there are many ...
... (373/288)−2 ×1 AU= 0.6 AU to (273/288)−1 ×1 AU= 1.1 AU. In principle this would include Venus but not Mars. As an indication of how different assumptions can change the range, I have also seen ranges such as 0.95 AU to 1.37 AU for the habitable zone. It’s not exact. One reason is that there are many ...
Star Constellations
... some stars are smaller than our Sun, and some are larger. Except for our own Sun, all stars are so far away that they only look like single points—even through a telescope. Constellations ...
... some stars are smaller than our Sun, and some are larger. Except for our own Sun, all stars are so far away that they only look like single points—even through a telescope. Constellations ...
Goal: To understand clusters of stars
... • Open clusters are YOUNG clusters that drift apart in about a billion years. • As viewed from Earth you tend to see the blue high mass stars. • Those are always young stars as they don’t last long. • These are clusters with stars of equal age, distance, and composition, but range in mass. ...
... • Open clusters are YOUNG clusters that drift apart in about a billion years. • As viewed from Earth you tend to see the blue high mass stars. • Those are always young stars as they don’t last long. • These are clusters with stars of equal age, distance, and composition, but range in mass. ...
Goal: To understand clusters of stars
... globular cluster. • Millions of stars closely packed. • This is a closed group. • Close or far away? ...
... globular cluster. • Millions of stars closely packed. • This is a closed group. • Close or far away? ...
Review: How does a star`s mass determine its life story?
... Two Types of Supernova Massive star supernova: Iron core of massive star reaches white dwarf limit and collapses into a neutron star, causing explosion White dwarf supernova: Carbon fusion suddenly begins as white dwarf in close binary system reaches white dwarf limit, causing total explosion ...
... Two Types of Supernova Massive star supernova: Iron core of massive star reaches white dwarf limit and collapses into a neutron star, causing explosion White dwarf supernova: Carbon fusion suddenly begins as white dwarf in close binary system reaches white dwarf limit, causing total explosion ...
The Celestial Sphere
... "The Sun is just one among a hundred billion stars in the Milky Way Galaxy, each with its own cosmic tale to tell." — Timothy Ferris, in the film Seeing in the Dark ...
... "The Sun is just one among a hundred billion stars in the Milky Way Galaxy, each with its own cosmic tale to tell." — Timothy Ferris, in the film Seeing in the Dark ...
Standard EPS Shell Presentation
... values for absolute brightness using a source of light called a standard ...
... values for absolute brightness using a source of light called a standard ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.