First Stars II
... Star formation in large objects (Tvir>104K) Evolution of T in the prestellar collapse Fragmentaion scale vs 5UV intensity radiation： Jn=W Bn(10 K) from massive PopIII stars ...
... Star formation in large objects (Tvir>104K) Evolution of T in the prestellar collapse Fragmentaion scale vs 5UV intensity radiation： Jn=W Bn(10 K) from massive PopIII stars ...
Part 2 of Our Lecture
... to the same procedures followed for Tr 37) only 1 sample shows indications of active accretion (CTTS). – black dotted line : similar spectral type derived from Kenyon & Hartmann (1995) – magenta dashed line : the median disk emission in Taurus – light blue line : the median disk emission in Tr 37 ...
... to the same procedures followed for Tr 37) only 1 sample shows indications of active accretion (CTTS). – black dotted line : similar spectral type derived from Kenyon & Hartmann (1995) – magenta dashed line : the median disk emission in Taurus – light blue line : the median disk emission in Tr 37 ...
Astronomical Imaging: Overview
... – Wavelengths are much longer than visible light • millimeters (and longer) vs. hundreds of nanometers ...
... – Wavelengths are much longer than visible light • millimeters (and longer) vs. hundreds of nanometers ...
Milky Way galaxy drawing
... Name ______________________________________________________ Date______________________________ Hour__________ Rubric for Milky Way Galaxy Drawing 4 points ...
... Name ______________________________________________________ Date______________________________ Hour__________ Rubric for Milky Way Galaxy Drawing 4 points ...
cocoon - Adams State University
... These dust grains are usually less than 0.5 micrometers across ...
... These dust grains are usually less than 0.5 micrometers across ...
Solar Spectrum Birth of Spectroscopy Kirchhoff`s Laws Types of
... – Stars did not occur with all possible combination of temperature and luminosity – Stars tended to group together – A large number of stars (including the sun) were found in a band they called the Main Sequence This suggested that the observed properties of stars are interrelated ...
... – Stars did not occur with all possible combination of temperature and luminosity – Stars tended to group together – A large number of stars (including the sun) were found in a band they called the Main Sequence This suggested that the observed properties of stars are interrelated ...
Discovery of White Dwarfs—8 Oct
... Main-sequence or dwarf stars Giants Horizontal-branch stars White dwarfs are too faint for these observations. A star lives a long time as a dwarf. It is on the main sequence. When it runs out of fuel, it becomes a giant and subsequently “traces out the giant branch.” ...
... Main-sequence or dwarf stars Giants Horizontal-branch stars White dwarfs are too faint for these observations. A star lives a long time as a dwarf. It is on the main sequence. When it runs out of fuel, it becomes a giant and subsequently “traces out the giant branch.” ...
star pattern identification : application to the precise attitude
... thus the attitude determination went inaccurate in the region of scientific interest. All these problems which were left aside in a first intensive attitude production were recently reassessed and the present status of their solution is described in this work. Of particular interest was the possibil ...
... thus the attitude determination went inaccurate in the region of scientific interest. All these problems which were left aside in a first intensive attitude production were recently reassessed and the present status of their solution is described in this work. Of particular interest was the possibil ...
Lecture 4: Telescopes Web site Stuff from last time Naked eye and magnitudes
... How can you tell if a star is circumpolar from your location? Why do we have time zones? How can you use the stars to get your latitude and longitude? ...
... How can you tell if a star is circumpolar from your location? Why do we have time zones? How can you use the stars to get your latitude and longitude? ...
Our_Unique_Planet
... “Magnetic Field” surrounding the earth. This provides protection from hard stellar radiation (ex. Solar Wind ) for us as well as keeping the atmosphere from being ...
... “Magnetic Field” surrounding the earth. This provides protection from hard stellar radiation (ex. Solar Wind ) for us as well as keeping the atmosphere from being ...
Chapter 6: Stellar Evolution (part 2)
... I But, physically most of the accreted materials is fused to carbon and oxygen during nova and possibly ejected. So all these need to lead to the increase of the WD mass. I The accumulated X-ray emission from such accreting sources, as observed from nearby galaxies, seems to be far less than require ...
... I But, physically most of the accreted materials is fused to carbon and oxygen during nova and possibly ejected. So all these need to lead to the increase of the WD mass. I The accumulated X-ray emission from such accreting sources, as observed from nearby galaxies, seems to be far less than require ...
The Oort Cloud
... 2.96 AU apart, brown dwarf as companion star o G196-3 300 AU apart, brown dwarf companion size of Jupiter ...
... 2.96 AU apart, brown dwarf as companion star o G196-3 300 AU apart, brown dwarf companion size of Jupiter ...
Document
... • Stars and other interstellar material are in a perpetual battle between forces pulling in (gravity) and forces pushing out (pressure). • Gravity comes from the mass of the cloud or star. • Pressure comes from the motion of the atoms or molecules. – Think of hot air balloons. – The hotter the air, ...
... • Stars and other interstellar material are in a perpetual battle between forces pulling in (gravity) and forces pushing out (pressure). • Gravity comes from the mass of the cloud or star. • Pressure comes from the motion of the atoms or molecules. – Think of hot air balloons. – The hotter the air, ...
May 2015 - Hermanus Astronomy
... billion years ago, but our Sun was late for the party, not forming until roughly 5 billion years ago. By that time, the star formation rate in our galaxy had plunged to a trickle. Missing the party, however, may not have been so bad. The Sun’s late appearance may actually have fostered the growth of ...
... billion years ago, but our Sun was late for the party, not forming until roughly 5 billion years ago. By that time, the star formation rate in our galaxy had plunged to a trickle. Missing the party, however, may not have been so bad. The Sun’s late appearance may actually have fostered the growth of ...
(Diurnal) Motion of the Sky A star`s daily path is its diurnal circle
... •Observer’s Latitude is also needed The Equatorial System provides an excellent means for creating star charts and catalogs ...
... •Observer’s Latitude is also needed The Equatorial System provides an excellent means for creating star charts and catalogs ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.