Magnitudes - Astronomy @ Walton High School
... said to have an apparent magnitude of 1. A faint star has an apparent magnitude of 6. A few stars, planets and of course our own Sun have been recategorised so they appear brighter than 1. Sirius appears at 1, Venus at -4, a full Moon at -9 and the Sun at -29. ...
... said to have an apparent magnitude of 1. A faint star has an apparent magnitude of 6. A few stars, planets and of course our own Sun have been recategorised so they appear brighter than 1. Sirius appears at 1, Venus at -4, a full Moon at -9 and the Sun at -29. ...
light energy
... • Distances can be deceiving: Bright stars look close, but may be very far away Star Approx. Distance (LY) P. Centari ...
... • Distances can be deceiving: Bright stars look close, but may be very far away Star Approx. Distance (LY) P. Centari ...
1 au d p = 1 au d
... Local luminosity function (stars with d < 20 pc) for the Milky Way measured by Kroupa, Tout & Gilmore (1993): ...
... Local luminosity function (stars with d < 20 pc) for the Milky Way measured by Kroupa, Tout & Gilmore (1993): ...
Lecture 10 February 13
... So B increases from 1Gauss to a Million Gauss A million Gauss can rip normal matter apart! ...
... So B increases from 1Gauss to a Million Gauss A million Gauss can rip normal matter apart! ...
Chap 11 Characterizing Stars v2
... the constellation Orion labeled with their names and apparent magnitudes. ...
... the constellation Orion labeled with their names and apparent magnitudes. ...
The Stars
... The Supergiants! • On the very top of the HR Diagram are cool but extremely bright stars. • These are the supergiants, stars that some day will supernova. • They eventually might become black holes. ...
... The Supergiants! • On the very top of the HR Diagram are cool but extremely bright stars. • These are the supergiants, stars that some day will supernova. • They eventually might become black holes. ...
Make one copy for each student on plain paper. Life Cycle of Star
... Make one copy for each student on plain paper. ...
... Make one copy for each student on plain paper. ...
Spectral Variations of Several RV Tauri Type Stars Patrick Durant
... already in our database as well as other RV Tauri and SemiRegular variables. Using the results of Nesmith and Cash (adjacent poster, this conference), we will identify the specific future Julian dates corresponding to data gaps in phase space and obtain spectra on those dates. ...
... already in our database as well as other RV Tauri and SemiRegular variables. Using the results of Nesmith and Cash (adjacent poster, this conference), we will identify the specific future Julian dates corresponding to data gaps in phase space and obtain spectra on those dates. ...
Notes - Bill Wolf
... and luminosity to denote how much light the star is actually giving off. These two words have analogous magnitude scales. The magnitude scale that measures brightness is the one that Hipparchus thought up. We call it Apparent Magnitude, often denoted m. The scale corresponding to luminosity is calle ...
... and luminosity to denote how much light the star is actually giving off. These two words have analogous magnitude scales. The magnitude scale that measures brightness is the one that Hipparchus thought up. We call it Apparent Magnitude, often denoted m. The scale corresponding to luminosity is calle ...
North Star
... The Earth’s orbit around the Sun causes different stars and constellations to be visible at different times during the year. ...
... The Earth’s orbit around the Sun causes different stars and constellations to be visible at different times during the year. ...
(HR) Diagrams
... HR Diagrams: How They Work, How to Read Them, What They Tell Us Hertzprung-Russell (HR) diagrams are a super-powerful tool for analyzing and understanding stars, how stars are “born” (come into existence), how stars “live” (exist and behave) through their stages of life…the list goes on. Note that, ...
... HR Diagrams: How They Work, How to Read Them, What They Tell Us Hertzprung-Russell (HR) diagrams are a super-powerful tool for analyzing and understanding stars, how stars are “born” (come into existence), how stars “live” (exist and behave) through their stages of life…the list goes on. Note that, ...
LIGO Star Chart
... the northern hemisphere. No telescope is necessary but the sky should be dark. This activity will show you how to locate several features of the night sky. The Big Dipper is the easiest group of stars to identify and can point you in the direction of other interesting areas of the sky. ...
... the northern hemisphere. No telescope is necessary but the sky should be dark. This activity will show you how to locate several features of the night sky. The Big Dipper is the easiest group of stars to identify and can point you in the direction of other interesting areas of the sky. ...
observingopenclusters-2-2-1
... to the Sun Slide your scope or binoculars parallel to the dog’s back and then move west of that line. You will pick up a large rich field of stars – Open Cluster M41 Procyon (Canis Minor) Locate next large and (also close) Procyon This points the way to 2 very different open clusters in Monocerous, ...
... to the Sun Slide your scope or binoculars parallel to the dog’s back and then move west of that line. You will pick up a large rich field of stars – Open Cluster M41 Procyon (Canis Minor) Locate next large and (also close) Procyon This points the way to 2 very different open clusters in Monocerous, ...
STARS
... • An enormous explosion when a large star dies. • When all the hydrogen is used up the core collapses • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
... • An enormous explosion when a large star dies. • When all the hydrogen is used up the core collapses • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... • Astronomers determine the mass of a star by examining how strong the gravitational field is around that star. (Isaac Newton’s law of universal gravitation; §4-7) • By studying the motion of planets around our Sun, astronomers have determined that the Sun has a mass of 2 x 1030 kilograms. • We cann ...
... • Astronomers determine the mass of a star by examining how strong the gravitational field is around that star. (Isaac Newton’s law of universal gravitation; §4-7) • By studying the motion of planets around our Sun, astronomers have determined that the Sun has a mass of 2 x 1030 kilograms. • We cann ...
If you wish to a copy of this months Night Sky News
... prominent and brilliant star, Regulus, lying within half a degree of the ecliptic at some 85 light-years distance. In this position it is occulted occasionally by the Moon. It is a blue-white star of spectral type B7, radiating about 130 times as much light as the Sun and seen from Earth at magnitud ...
... prominent and brilliant star, Regulus, lying within half a degree of the ecliptic at some 85 light-years distance. In this position it is occulted occasionally by the Moon. It is a blue-white star of spectral type B7, radiating about 130 times as much light as the Sun and seen from Earth at magnitud ...
Measuring the Stars
... the period and semi-major axis of the orbit must be measured. •Kepler’s third law gives the sum of the masses of the two stars. •Relative speeds of the two stars can be measured using the Doppler effect •Speed will be inversely proportional to the mass. This allows us to calculate the mass of each s ...
... the period and semi-major axis of the orbit must be measured. •Kepler’s third law gives the sum of the masses of the two stars. •Relative speeds of the two stars can be measured using the Doppler effect •Speed will be inversely proportional to the mass. This allows us to calculate the mass of each s ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.