* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Astronomical distances and Stellar magnitudes
Copernican heliocentrism wikipedia , lookup
Astronomical clock wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Theoretical astronomy wikipedia , lookup
Geocentric model wikipedia , lookup
Archaeoastronomy wikipedia , lookup
Astrophotography wikipedia , lookup
Dyson sphere wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Tropical year wikipedia , lookup
Star of Bethlehem wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
Equation of time wikipedia , lookup
Chinese astronomy wikipedia , lookup
Corona Borealis wikipedia , lookup
History of astronomy wikipedia , lookup
Observational astronomy wikipedia , lookup
Astronomical spectroscopy wikipedia , lookup
Extraterrestrial skies wikipedia , lookup
Auriga (constellation) wikipedia , lookup
Canis Minor wikipedia , lookup
Canis Major wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Aries (constellation) wikipedia , lookup
Corona Australis wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Astronomical unit wikipedia , lookup
Cosmic distance ladder wikipedia , lookup
Astronomical distances and stellar magnitudes 1. What is meant by a light year? 2. What is meant by an astronomical unit (AU)? 3. What is meant by a parsec (pc)? 4. What is meant by a mega parsec (Mpc)? 5. What is meant by the apparent magnitude of an astronomical object? 6. Give the approximate distance of the following in AU: (a) Sun to the Earth (b) Sun to Jupiter (c) Sun to Saturn (d) Sun to Pluto 7. Give the approximate distance of the following in light years: (a) Sun to the nearest star (b) from one side of our galaxy to the other (c) from our solar system to the Andromeda galaxy (M31) (d) to the most distant object so far observed in the Universe 8. What is the difference in intensity between two stars with a magnitude difference of 5? 9. Write down the equation relating the absolute magnitude, the apparent magnitude and the distance of a star. 10. What is the absolute magnitude of a star that is 20 pc away from the Earth if its apparent magnitude is 10? 11. What is the approximate apparent magnitude of a star such as Sirius? 12. What is the distance of a star (in parsecs) if it has an apparent magnitude of 6 and an absolute magnitude of –1.5?