Stellar Evolution
... • Groups of stars all at the same distance and age. • Watch evolution along the H-R diagram. • See differences between low-mass and high-mass. ...
... • Groups of stars all at the same distance and age. • Watch evolution along the H-R diagram. • See differences between low-mass and high-mass. ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
... 9” and the earth’s radius is 4000 miles. 15. Prove that equation of time vanishes four times a year. 16. Define sidereal month and synodic month of the moon and find the relation between them. 17. Compare lunar and solar eclipses. 18. Prove that among any two planets, the inner planet moves faster t ...
... 9” and the earth’s radius is 4000 miles. 15. Prove that equation of time vanishes four times a year. 16. Define sidereal month and synodic month of the moon and find the relation between them. 17. Compare lunar and solar eclipses. 18. Prove that among any two planets, the inner planet moves faster t ...
1 Name: Date: PARALLAX EXERCISE1 The goal of this
... it was once believed that they were different types of objects. In fact, the Sun was once considered a planet! We now know the Sun is just another star, and the reason that the Sun appears different to us is that it is so much closer. Determining distances to celestial objects is one of the most imp ...
... it was once believed that they were different types of objects. In fact, the Sun was once considered a planet! We now know the Sun is just another star, and the reason that the Sun appears different to us is that it is so much closer. Determining distances to celestial objects is one of the most imp ...
document
... Most large galaxies have a super massive black hole in their center, and most of them are don’t show up either. Galaxies with bigger bulges usually have heavier black holes. ...
... Most large galaxies have a super massive black hole in their center, and most of them are don’t show up either. Galaxies with bigger bulges usually have heavier black holes. ...
The Universe
... • It provides us with many of the images we have of space. • It is an especially useful telescope because it does not have to view things through our atmosphere ...
... • It provides us with many of the images we have of space. • It is an especially useful telescope because it does not have to view things through our atmosphere ...
The Universe - staff.harrisonburg.k12.va
... • It provides us with many of the images we have of space. • It is an especially useful telescope because it does not have to view things through our atmosphere ...
... • It provides us with many of the images we have of space. • It is an especially useful telescope because it does not have to view things through our atmosphere ...
Astronomy 1020 Exam 4 Review Questions
... 19. What would the mass of a black hole be if its Schwarzschild radius was the same radius as the Sun? 20. What 3 observational characteristics do the best black hole candidates possess? What are the 4 best black hole candidates that have been observed? Of these 4, which is the best stellar black ho ...
... 19. What would the mass of a black hole be if its Schwarzschild radius was the same radius as the Sun? 20. What 3 observational characteristics do the best black hole candidates possess? What are the 4 best black hole candidates that have been observed? Of these 4, which is the best stellar black ho ...
Lecture 14
... sort of force stops contraction before the core temperature rises above 107 K. • Thermal pressure cannot stop contraction because the star is constantly losing thermal energy from its ...
... sort of force stops contraction before the core temperature rises above 107 K. • Thermal pressure cannot stop contraction because the star is constantly losing thermal energy from its ...
Lecture 1
... exoplanet — A moderately large object that orbits a star and shines primarily by reflecting light from its star. According to the 2006 definition of the IAU (International Astronomical Union), an object can be considered an exoplanet only if it: 1. orbits a star (or stellar remnant) 2. has a mass l ...
... exoplanet — A moderately large object that orbits a star and shines primarily by reflecting light from its star. According to the 2006 definition of the IAU (International Astronomical Union), an object can be considered an exoplanet only if it: 1. orbits a star (or stellar remnant) 2. has a mass l ...
Word - El Camino College
... image). The planet has about 5 times Jupiter’s mass, well within the range of being a planet and way too low to be even a brown dwarf, let alone a star. It orbits the star at about 1.5 times the distance Pluto orbits from the Sun. The two are close by as these things go: just 70 parsecs (230 light y ...
... image). The planet has about 5 times Jupiter’s mass, well within the range of being a planet and way too low to be even a brown dwarf, let alone a star. It orbits the star at about 1.5 times the distance Pluto orbits from the Sun. The two are close by as these things go: just 70 parsecs (230 light y ...
1. Describe (preferably with a sketch) what astronomer
... a) Describe the spectrum we saw when we looked at the tube through our plastic diffraction gratings. (You should know what the spectrum of hot hydrogen gas looks like, at least qualitatively, even if you missed class that day.) We saw an emission line spectrum. There was light only at a few waveleng ...
... a) Describe the spectrum we saw when we looked at the tube through our plastic diffraction gratings. (You should know what the spectrum of hot hydrogen gas looks like, at least qualitatively, even if you missed class that day.) We saw an emission line spectrum. There was light only at a few waveleng ...
The Sun and the Solar System
... • There is a debris field (asteroid belt) and evidence for clouds of (cometary) debris beyond the orbit of Neptune. • There is evidence for differen)a)on in chemical composi)on across the solar system. ...
... • There is a debris field (asteroid belt) and evidence for clouds of (cometary) debris beyond the orbit of Neptune. • There is evidence for differen)a)on in chemical composi)on across the solar system. ...
Fun Facts: Sunshine
... We use an instrument called a Campbell-Stokes Recorder to record sunshine. It consists of a spherical lens – a bit like a crystal ball. This glass ball focuses the sun's rays onto a cardboard strip. ...
... We use an instrument called a Campbell-Stokes Recorder to record sunshine. It consists of a spherical lens – a bit like a crystal ball. This glass ball focuses the sun's rays onto a cardboard strip. ...
T = 5800 K
... The collisions broaden the absorption lines in the star’s spectrum. Giant stars are larger and less dense than main sequence stars, so their absorption lines are narrower than those of main sequence stars. The spectra shown above illustrate this effect. Notice that the absorption lines in the spectr ...
... The collisions broaden the absorption lines in the star’s spectrum. Giant stars are larger and less dense than main sequence stars, so their absorption lines are narrower than those of main sequence stars. The spectra shown above illustrate this effect. Notice that the absorption lines in the spectr ...
a to z of astronomy
... An object with so much mass compressed into such a small volume that the escape velocity equals or exceeds the speed of light. The centres of many galaxies and quasars etc. are thought to contain black holes with masses many millions of times that of the Sun. Smaller black holes may be formed when a ...
... An object with so much mass compressed into such a small volume that the escape velocity equals or exceeds the speed of light. The centres of many galaxies and quasars etc. are thought to contain black holes with masses many millions of times that of the Sun. Smaller black holes may be formed when a ...
The Cosmic Near-Infrared Background: Remnant light form
... due to the mass spectrum could be large. •An accurate determination of the near-infrared background allows us to probe the formation history of early stars, which is difficult to constrain by other means. •A reasonable initial mass function, coupled with this star formation rate, does not overproduc ...
... due to the mass spectrum could be large. •An accurate determination of the near-infrared background allows us to probe the formation history of early stars, which is difficult to constrain by other means. •A reasonable initial mass function, coupled with this star formation rate, does not overproduc ...
Document
... • Rock & Metals form where T < 1300 K • Carbon grains & ices where T(gas) < 300 K • Inner planets and asteroids: Rocky and metallic • Snow line • Outer Jovian systems: Gaseous giants, carbon ices • Dust grains and ices collide, accrete, and eventually grow bigger gravitationally into planetesimals b ...
... • Rock & Metals form where T < 1300 K • Carbon grains & ices where T(gas) < 300 K • Inner planets and asteroids: Rocky and metallic • Snow line • Outer Jovian systems: Gaseous giants, carbon ices • Dust grains and ices collide, accrete, and eventually grow bigger gravitationally into planetesimals b ...
Astronomical Constants
... D) Would you be able to observe stars as far south as -50 declination? Explain. ...
... D) Would you be able to observe stars as far south as -50 declination? Explain. ...
Lecture 37: The Pale Blue Dot
... Direct detection of exoEarths is hard because of their small size and extreme faintness relative to their parent stars. The spectrum of the Earth has two humps: reflected sunlight and thermal emission. Spectral properties can measure the size and surface temperatures of exoEarths. Spectral biomarker ...
... Direct detection of exoEarths is hard because of their small size and extreme faintness relative to their parent stars. The spectrum of the Earth has two humps: reflected sunlight and thermal emission. Spectral properties can measure the size and surface temperatures of exoEarths. Spectral biomarker ...
The Oort Cloud
... Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc 5 of these enter inner solar system per year It takes thousands of years for them to orbit the sun ...
... Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc 5 of these enter inner solar system per year It takes thousands of years for them to orbit the sun ...
Astronomy 15 - Problem Set Number 4 1) Suppose one were to
... b) A star is found to have a displacement on the plates of almost half a pixel - 10 microns due to parallax, and simultaneously has a yearly displacement of 20 microns due to proper motion. Find its annual proper motion, its distance, and its transverse velocity. c) For this same star, a heliocentri ...
... b) A star is found to have a displacement on the plates of almost half a pixel - 10 microns due to parallax, and simultaneously has a yearly displacement of 20 microns due to proper motion. Find its annual proper motion, its distance, and its transverse velocity. c) For this same star, a heliocentri ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.