society journal - Auckland Astronomical Society
... The session will start in the planetarium with a tour of the summer night sky and as it gets dark outside we will move to telescope viewing. The EWB Zeiss Telescope will be available for viewing as well as portable telescopes outside in the courtyard. Ivan Vazey (AAS Curator) will be on hand to help ...
... The session will start in the planetarium with a tour of the summer night sky and as it gets dark outside we will move to telescope viewing. The EWB Zeiss Telescope will be available for viewing as well as portable telescopes outside in the courtyard. Ivan Vazey (AAS Curator) will be on hand to help ...
Galaxy Characteristics
... Alternative to Luminosity I(R) = Flux/area = erg/s/cm2/arcsec2 I(0) – center flux I(R) = at radius R • Define R where I=25, R25 • Often R25 defines edge • “I” depends on wavelength ...
... Alternative to Luminosity I(R) = Flux/area = erg/s/cm2/arcsec2 I(0) – center flux I(R) = at radius R • Define R where I=25, R25 • Often R25 defines edge • “I” depends on wavelength ...
Stars: from Adolescence to Old Age
... outside layers also collapse layers closer to the center collapse faster than those near the surface. As the layers collapses, the gas compresses and ...
... outside layers also collapse layers closer to the center collapse faster than those near the surface. As the layers collapses, the gas compresses and ...
Day 1: How to Describe the Sky The Motions of the Stars
... East of Leo and Cancer is to the West. One month earlier, which of these constellations was high in the Southern sky at midnight? • A: Leo • B: Virgo • C: Cancer ...
... East of Leo and Cancer is to the West. One month earlier, which of these constellations was high in the Southern sky at midnight? • A: Leo • B: Virgo • C: Cancer ...
Chapter 30 Notes
... As the planetary nebula disperses; gravity causes the remaining matter in the star to collapse inward until it cannot be pressed further together. A hot, extremely dense core of matter is left behind. This mass is called a white dwarf and can shine for billions of years before it cools completely. S ...
... As the planetary nebula disperses; gravity causes the remaining matter in the star to collapse inward until it cannot be pressed further together. A hot, extremely dense core of matter is left behind. This mass is called a white dwarf and can shine for billions of years before it cools completely. S ...
Document
... The Helium burning phase The helium burning phase is much shorter than the hydrogen burning phase. Helium burning produces about 1/10 the energy per unit mass compared to Hydrogen burning. Also, the star’s luminosity is higher by about an order of magnitude compared to the MS Low mass stars (0.7-2. ...
... The Helium burning phase The helium burning phase is much shorter than the hydrogen burning phase. Helium burning produces about 1/10 the energy per unit mass compared to Hydrogen burning. Also, the star’s luminosity is higher by about an order of magnitude compared to the MS Low mass stars (0.7-2. ...
Stellar Evolution: the Death of Stars
... • Electron combines with proton to form neutrons • During the combining process, it produces neutrinos that carry energy away • The core ends up as all neutron, with nuclear density (1017 km/m3) • The degenerate neutron pressure suddenly halts the core contract • The outer core bounce back and sends ...
... • Electron combines with proton to form neutrons • During the combining process, it produces neutrinos that carry energy away • The core ends up as all neutron, with nuclear density (1017 km/m3) • The degenerate neutron pressure suddenly halts the core contract • The outer core bounce back and sends ...
ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... their outer atmospheres due to the fact that the convection zone of these stars do not extend very deep into the star and these outer layers never get hot enough to deplete lithium through fusion. However these stars are easily distinguishable from brown dwarfs by their temperatures. ...
... their outer atmospheres due to the fact that the convection zone of these stars do not extend very deep into the star and these outer layers never get hot enough to deplete lithium through fusion. However these stars are easily distinguishable from brown dwarfs by their temperatures. ...
The Lives of Stars
... formation and evolution • Newborn stars may form an open or galactic cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape, or “evaporate,” from such a cluster • A stellar association is a group of newborn stars that are mov ...
... formation and evolution • Newborn stars may form an open or galactic cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape, or “evaporate,” from such a cluster • A stellar association is a group of newborn stars that are mov ...
Lecture11
... • Viewing a galaxy edge-on, you see a dark lane where starlight is being absorbed by dust. ...
... • Viewing a galaxy edge-on, you see a dark lane where starlight is being absorbed by dust. ...
www.astro.utu.fi
... The white dwarfs capture WIMPS, which eventually annihilate, providing energy White dwarfs glow hotter and brighter than they otherwise would, at the toasty temperature of 60 K entire galaxy glows with same luminosity as Sun! this fuel source will eventually run out too, and stars begin to fade ...
... The white dwarfs capture WIMPS, which eventually annihilate, providing energy White dwarfs glow hotter and brighter than they otherwise would, at the toasty temperature of 60 K entire galaxy glows with same luminosity as Sun! this fuel source will eventually run out too, and stars begin to fade ...
Galaxy / Cluster Ecosystem Ming Sun (University of Alabama in Huntsville)
... The prevalence of coronae for massive galaxies implies these mini cool cores are long-lived. Possible heat sources include weak AGN outbursts and SN (with caveats). Radio AGN in clusters and groups that do not reside in large cool cores are generally associated with small coronae. Strong radio AGN i ...
... The prevalence of coronae for massive galaxies implies these mini cool cores are long-lived. Possible heat sources include weak AGN outbursts and SN (with caveats). Radio AGN in clusters and groups that do not reside in large cool cores are generally associated with small coronae. Strong radio AGN i ...
What are yellow stars?
... Yellow stars are stars that have reached a temperature of 5,000 to 6,000 degrees Fahrenheit, and around 6,000 Kelvin. Yellow Stars have an average temperature and that makes them yellow. Blue stars are the hottest, red are the coldest. Arcturus and Antares are some of the biggest Yellow Stars that w ...
... Yellow stars are stars that have reached a temperature of 5,000 to 6,000 degrees Fahrenheit, and around 6,000 Kelvin. Yellow Stars have an average temperature and that makes them yellow. Blue stars are the hottest, red are the coldest. Arcturus and Antares are some of the biggest Yellow Stars that w ...
Blackbody Radiation
... 7. Let’s say you measured the blackbody spectrum of Star E and found that the peak intensity was just as great as star A, but the peak wavelength was at 750 nm rather than 600 nm. What can you state given this information? a. Star E is smaller and cooler than Star A. b. Star E is hotter and larger t ...
... 7. Let’s say you measured the blackbody spectrum of Star E and found that the peak intensity was just as great as star A, but the peak wavelength was at 750 nm rather than 600 nm. What can you state given this information? a. Star E is smaller and cooler than Star A. b. Star E is hotter and larger t ...
Tour of the Universe
... ● Some of the stars are much closer to Earth than others. Because of proper motion, they will look different in ten thousand years. ● These stars are not held together by gravity. ● Proper motion the part of the apparent motion of a fixed star that is due to its actual movement in space rela ...
... ● Some of the stars are much closer to Earth than others. Because of proper motion, they will look different in ten thousand years. ● These stars are not held together by gravity. ● Proper motion the part of the apparent motion of a fixed star that is due to its actual movement in space rela ...
Introduction to Astrotheology
... birth. This relation is based on the three decanates (or decans for short) per Zodiac sign. A decan is the division of the full period of a Zodiac sign (of 30 degrees of arc) into three equal periods (of 10 degrees of arc). Roughly, we can say that the people who were born on the day numbers of 21 a ...
... birth. This relation is based on the three decanates (or decans for short) per Zodiac sign. A decan is the division of the full period of a Zodiac sign (of 30 degrees of arc) into three equal periods (of 10 degrees of arc). Roughly, we can say that the people who were born on the day numbers of 21 a ...
Supernova - Mid-Pacific Institute
... discovered bright supernovae occurring in the Milky Way in 1572 and 1604. no supernova has been seen in our Galaxy since Kepler's. ...
... discovered bright supernovae occurring in the Milky Way in 1572 and 1604. no supernova has been seen in our Galaxy since Kepler's. ...
Multi-physics simulations using a hierarchical interchangeable
... The AMUSE environment allows astrophysical codes from different domains to be combined to conduct numerical experiments. The community codes are generally written independently, so AMUSE encompasses a wide variety of computer languages and programming styles. The fundamental design feature of the fr ...
... The AMUSE environment allows astrophysical codes from different domains to be combined to conduct numerical experiments. The community codes are generally written independently, so AMUSE encompasses a wide variety of computer languages and programming styles. The fundamental design feature of the fr ...
Stellar Parallax Problems
... 6. A. The European Space Agency sent an exact copy of the Gaia mission to orbit Saturn and take parallax measurements, what would be the largest distance to a star that the Gaia spacecraft could measure from that orbit? ...
... 6. A. The European Space Agency sent an exact copy of the Gaia mission to orbit Saturn and take parallax measurements, what would be the largest distance to a star that the Gaia spacecraft could measure from that orbit? ...
CHAP
... - The stars’ colors reveal the ____________________ of the stars. - Cool stars appear _________ in color with a surface temperature of about 3,200 degrees Celsius. - Warm stars appear _____________ in color with a surface temperature of about 5,500 degrees Celsius. - The hottest stars are __________ ...
... - The stars’ colors reveal the ____________________ of the stars. - Cool stars appear _________ in color with a surface temperature of about 3,200 degrees Celsius. - Warm stars appear _____________ in color with a surface temperature of about 5,500 degrees Celsius. - The hottest stars are __________ ...
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.