Wednesday, April 17 - Otterbein University
... L R2 T4 (2) • We can compare two values of absolute luminosity L to get the size ...
... L R2 T4 (2) • We can compare two values of absolute luminosity L to get the size ...
light years - Physics and Astronomy
... Stars - about 3000 visible Patterns of stars - constellations 88 of them Useful for finding our way around the sky, navigating the oceans ...
... Stars - about 3000 visible Patterns of stars - constellations 88 of them Useful for finding our way around the sky, navigating the oceans ...
Chapter 3: the Sun
... Involves measuring the proper motion of a star in the search for an influence caused by its planets changes in proper motion are so small that the best current equipment cannot produce reliable enough measurements. This method requires that the planets' orbits be nearly perpendicular to our line of ...
... Involves measuring the proper motion of a star in the search for an influence caused by its planets changes in proper motion are so small that the best current equipment cannot produce reliable enough measurements. This method requires that the planets' orbits be nearly perpendicular to our line of ...
PC2491 Examples 2
... (6) An atomic hydrogen cloud has a uniform density of 109 atoms m-3 and a temperature of 100K. Estimate how large the cloud can be before it begins to collapse under its own gravity. ...
... (6) An atomic hydrogen cloud has a uniform density of 109 atoms m-3 and a temperature of 100K. Estimate how large the cloud can be before it begins to collapse under its own gravity. ...
The Hubble Deep Field (HDF)
... 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. ...
... 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. ...
The Hubble Deep Field (HDF)
... 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. ...
... 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. ...
Observational Astronomy Star Charts
... Motions of the Sun and Stars • Daily Motion – The rising and setting of the stars is caused by the Earth’s rotation about its axis. ...
... Motions of the Sun and Stars • Daily Motion – The rising and setting of the stars is caused by the Earth’s rotation about its axis. ...
What Can We See in the Night Sky?
... • Groups of stars that are close together and travel together are known as star clusters • Star clusters are part of galaxies • Open clusters – contain about 50 to 1000 stars – dispersed along the Milky Way’s main band ...
... • Groups of stars that are close together and travel together are known as star clusters • Star clusters are part of galaxies • Open clusters – contain about 50 to 1000 stars – dispersed along the Milky Way’s main band ...
absolute magnitude
... L R2 T4 (2) • We can compare two values of absolute luminosity L to get the size ...
... L R2 T4 (2) • We can compare two values of absolute luminosity L to get the size ...
Chapter 4
... a. Visible light takes up only a very small part of the total range of wavelengths in the electromagnetic spectrum. b. Visible light takes up most (but not all) of the total range of wavelengths in the electromagnetic spectrum. c. Visible light takes up all of the electromagnetic spectrum. d. Visibl ...
... a. Visible light takes up only a very small part of the total range of wavelengths in the electromagnetic spectrum. b. Visible light takes up most (but not all) of the total range of wavelengths in the electromagnetic spectrum. c. Visible light takes up all of the electromagnetic spectrum. d. Visibl ...
Class 11 and 12 lecture slides (giant planets)
... • Process accelerated until nebular gas was lost • So initial accretion was rapid (few Myr) • Uranus and Neptune didn’t acquire so much gas because they were further out and accreted more slowly • Planets will have initially been hot (gravitational energy) and subsequently cooled and contracted • We ...
... • Process accelerated until nebular gas was lost • So initial accretion was rapid (few Myr) • Uranus and Neptune didn’t acquire so much gas because they were further out and accreted more slowly • Planets will have initially been hot (gravitational energy) and subsequently cooled and contracted • We ...
Thursday October 1 - Montana State University
... It’s hard to read your protractor when it is dark outside. The parallax angle is very small because the stars are so far away. We can’t see any of the same stars six months apart. It actually is not difficult! ...
... It’s hard to read your protractor when it is dark outside. The parallax angle is very small because the stars are so far away. We can’t see any of the same stars six months apart. It actually is not difficult! ...
d - Haus der Astronomie
... By averaging, we find the approximate distance to the Andromeda Galaxy: (2,52 ± 0,14) 10 lyly ...
... By averaging, we find the approximate distance to the Andromeda Galaxy: (2,52 ± 0,14) 10 lyly ...
Badge Day - GBT
... 4. Cosmic Clues 1.Analyze the spectrum for three stars. What are the 2 most prominent differences between the spectra? Which star is hottest? ...
... 4. Cosmic Clues 1.Analyze the spectrum for three stars. What are the 2 most prominent differences between the spectra? Which star is hottest? ...
ASTR 300 Stars and Stellar Systems Spring 2011
... Since a star’s brightness varies as√ the inverse square of the distance, the distance would have to decrease by a factor of 15.85 = 3.981. (I.e., 3.9812 = 15.85.) Since Barnard’s star is now at 5.9 ly, we would have to move it to 5.9/3.981 = 1.48 ly. Barnard’s star is actually moving towards us at 1 ...
... Since a star’s brightness varies as√ the inverse square of the distance, the distance would have to decrease by a factor of 15.85 = 3.981. (I.e., 3.9812 = 15.85.) Since Barnard’s star is now at 5.9 ly, we would have to move it to 5.9/3.981 = 1.48 ly. Barnard’s star is actually moving towards us at 1 ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... How hot? WASP-43b’s day side is hot enough to melt iron (2,700°F); the night side is much “cooler”—at 900°F it would “only” melt lead. For perspective, that makes the night side as comfortable as Mercury’s day side—maybe worse, because of WASP-43b’s humid atmosphere. Because heat is so poorly distri ...
... How hot? WASP-43b’s day side is hot enough to melt iron (2,700°F); the night side is much “cooler”—at 900°F it would “only” melt lead. For perspective, that makes the night side as comfortable as Mercury’s day side—maybe worse, because of WASP-43b’s humid atmosphere. Because heat is so poorly distri ...
HW6 due - Yale Astronomy
... The probability for 1 star passing through a galaxy to collide with any 1 particular star from that galaxy is given by the ratio of the cross sectional area for a collision with the projected a ...
... The probability for 1 star passing through a galaxy to collide with any 1 particular star from that galaxy is given by the ratio of the cross sectional area for a collision with the projected a ...
Sample pages 2 PDF
... between type I and type II supernovae any more here.) The glowing remanents of a supernova which occurred in 1054 and was observed by Chinese astronomers can still be seen in the Crab nebula, of which a picture appears in Fig. 2.4. The supernovae are significant because they produce the elements abo ...
... between type I and type II supernovae any more here.) The glowing remanents of a supernova which occurred in 1054 and was observed by Chinese astronomers can still be seen in the Crab nebula, of which a picture appears in Fig. 2.4. The supernovae are significant because they produce the elements abo ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.