Document
... Peculiar stars such as post AGB stars and l Boo stars have iron abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted gas. Thus the iron abundances are artifically low, but the Carbon, ...
... Peculiar stars such as post AGB stars and l Boo stars have iron abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted gas. Thus the iron abundances are artifically low, but the Carbon, ...
Proper Motion
... Motion of the Pleiades over 120,000 years. This is an 8x6 degree field. http://www.rssd.esa.int/hipparc os/Pleiades_distance.html ...
... Motion of the Pleiades over 120,000 years. This is an 8x6 degree field. http://www.rssd.esa.int/hipparc os/Pleiades_distance.html ...
Educator`s Guide for Dark Star Adventure
... You may want to start your students off with quick, five-minute glimpses at the sky to spot some easy-tofind reference points. Can they find the moon? What does it look like? How about planets or stars of different colors? Some easy to find constellations include the Big Dipper, the Summer Triangle, ...
... You may want to start your students off with quick, five-minute glimpses at the sky to spot some easy-tofind reference points. Can they find the moon? What does it look like? How about planets or stars of different colors? Some easy to find constellations include the Big Dipper, the Summer Triangle, ...
Other Galaxies, their Distances, and the Expansion of the Universe
... variety of shapes and characteristics These are images obtained by my team with the Spitzer Space Telescope ...
... variety of shapes and characteristics These are images obtained by my team with the Spitzer Space Telescope ...
The Big Dipper is a
... If your astrological sign is Aries, the Sun should be in the constellation Aries on your birthday. The dates, according to astrological tradition, during which the Sun is in the constellation Aries are: March 21 to April 20th. In which constellation is the Sun actually in, during this time period? a ...
... If your astrological sign is Aries, the Sun should be in the constellation Aries on your birthday. The dates, according to astrological tradition, during which the Sun is in the constellation Aries are: March 21 to April 20th. In which constellation is the Sun actually in, during this time period? a ...
Life and Death of Stars - UM Research Repository
... sequence after totally achieved the hydrostatic equilibrium. It is the inward force which tends to compress the star, balanced by the outward force due to the pressure. All main sequence stars are powered by the fusion of hydrogen into helium in their cores. High-mass main sequenced stars have short ...
... sequence after totally achieved the hydrostatic equilibrium. It is the inward force which tends to compress the star, balanced by the outward force due to the pressure. All main sequence stars are powered by the fusion of hydrogen into helium in their cores. High-mass main sequenced stars have short ...
Extremely Large Telescopes
... • 60m could reach mH~29 in 100hrs (depending on source size) • Spectroscopy at z>10 hard even for 100m The Universe at z=6.1 (Gnedin 2000) Neutral H, ionising intensity (z), gas density, gas temperature ...
... • 60m could reach mH~29 in 100hrs (depending on source size) • Spectroscopy at z>10 hard even for 100m The Universe at z=6.1 (Gnedin 2000) Neutral H, ionising intensity (z), gas density, gas temperature ...
powerpoint file
... The crust of a neutron star is solid. Its highest mountains are only millimeters high. Why? The surface gravity is so high that a 150 pound person would weigh a million tons. You would be squeezed flatter than a piece of paper. The fastest pulsar known has a period of 0.0014 s. The star spins 642 ti ...
... The crust of a neutron star is solid. Its highest mountains are only millimeters high. Why? The surface gravity is so high that a 150 pound person would weigh a million tons. You would be squeezed flatter than a piece of paper. The fastest pulsar known has a period of 0.0014 s. The star spins 642 ti ...
chapter 8 Notes
... • Planets whose orbits are between the Sun and the asteroid belt as inner planets and those beyond the asteroid belt as outer planets. • The other system classifies planets whose orbits are between Earth’s orbit and the Sun as inferior planets, and those whose orbits are beyond Earth’s orbit as su ...
... • Planets whose orbits are between the Sun and the asteroid belt as inner planets and those beyond the asteroid belt as outer planets. • The other system classifies planets whose orbits are between Earth’s orbit and the Sun as inferior planets, and those whose orbits are beyond Earth’s orbit as su ...
No. 2 - Society for Astronomical Sciences
... Small-Telescope Science in the News – April - May 2010 I thought it might be fun to do a quarterly review of the “small telescope science” that has shown up in the literature or on the news. By “small telescope” I mean “within the range of telescopes and instruments that we backyard scientists might ...
... Small-Telescope Science in the News – April - May 2010 I thought it might be fun to do a quarterly review of the “small telescope science” that has shown up in the literature or on the news. By “small telescope” I mean “within the range of telescopes and instruments that we backyard scientists might ...
Astro 001 Spring 2002
... the terms carefully for two points per term. You may use sketches or diagrams to illustrate what you are talking about if you find that useful.: (1) Occam’s razor: ...
... the terms carefully for two points per term. You may use sketches or diagrams to illustrate what you are talking about if you find that useful.: (1) Occam’s razor: ...
We Are Made of Stardust
... For stars, there is a price to be paid for creativity: The more kinds of atoms created, the shorter-lived the star. Only the chemically laconic are long-lived. The reason pertains to gravity and how gravity determines the extent and pace of nuclear fusion. The more mass (more hydrogen) that a star b ...
... For stars, there is a price to be paid for creativity: The more kinds of atoms created, the shorter-lived the star. Only the chemically laconic are long-lived. The reason pertains to gravity and how gravity determines the extent and pace of nuclear fusion. The more mass (more hydrogen) that a star b ...
First results of observations with 80
... • Installation UBVRI filter wheel to start photometry observations • Control system renewal and stepper motors replacement by DC motors with encoders to improve the throughput of telescope • To change CHAOS control software on FORTE to increase stability of operations ...
... • Installation UBVRI filter wheel to start photometry observations • Control system renewal and stepper motors replacement by DC motors with encoders to improve the throughput of telescope • To change CHAOS control software on FORTE to increase stability of operations ...
How far away are the Stars?
... The Distance to the Stars! • Angular Separation is not enough! • We want to know the answer to the ‘age ...
... The Distance to the Stars! • Angular Separation is not enough! • We want to know the answer to the ‘age ...
Powerpoint
... temperature, until it is in equilibrium. This is stage 7: the star has reached the main sequence and will remain there as long as it has hydrogen to fuse in its core. ...
... temperature, until it is in equilibrium. This is stage 7: the star has reached the main sequence and will remain there as long as it has hydrogen to fuse in its core. ...
Astronomy Assignment #1
... Complete the assigned problems from the text listed below and address the Instructor Assigned Topic. Mathematical problems may be hand written. Write out the problem, show your work in solving the problem and state your answer in a complete sentence. Failure to complete all three of these tasks will ...
... Complete the assigned problems from the text listed below and address the Instructor Assigned Topic. Mathematical problems may be hand written. Write out the problem, show your work in solving the problem and state your answer in a complete sentence. Failure to complete all three of these tasks will ...
chapter16StarBirth
... • A typical molecular cloud (T~ 30 K, n ~ 300 particles/cm3) must contain at least a few hundred solar masses for gravity to overcome pressure • Emission lines from molecules in a cloud can prevent a pressure buildup by converting thermal energy into infrared and radio photons that escape the cloud. ...
... • A typical molecular cloud (T~ 30 K, n ~ 300 particles/cm3) must contain at least a few hundred solar masses for gravity to overcome pressure • Emission lines from molecules in a cloud can prevent a pressure buildup by converting thermal energy into infrared and radio photons that escape the cloud. ...
PoS(EVN 2014)058 - Proceeding of science
... A second source from the SBHW radio continuum survey has been detected within these early COBRaS data that displays a significantly resolved structure in the L-band images (see Fig. 3). This source has been identified as SBHW 90 [2]. The previous survey imaged the region at 1.4 and 0.35 GHz finding ...
... A second source from the SBHW radio continuum survey has been detected within these early COBRaS data that displays a significantly resolved structure in the L-band images (see Fig. 3). This source has been identified as SBHW 90 [2]. The previous survey imaged the region at 1.4 and 0.35 GHz finding ...
Chapter 13 Other Planetary Systems: The New Science of Distant
... us only the velocity toward or away from us. • Doppler data give us lower limits on masses. © 2010 Pearson Education, Inc. ...
... us only the velocity toward or away from us. • Doppler data give us lower limits on masses. © 2010 Pearson Education, Inc. ...