Astronomy Study Guide #2
... 10. What do you have to do in order to find the absolute magnitude of a star? What is apparent magnitude? 11. Which stars which contribute most to the chemical enrichment of the interstellar medium? 12. What is a light year? ...
... 10. What do you have to do in order to find the absolute magnitude of a star? What is apparent magnitude? 11. Which stars which contribute most to the chemical enrichment of the interstellar medium? 12. What is a light year? ...
Stars
... – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
... – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
JPL Small-Body Database Browser
... Barnard’s Star has the highest known proper motion of 10.3”/year. Even at that rate, Barnard’s Star will appear to move the angular diameter of a Full Moon only after 175 years. ...
... Barnard’s Star has the highest known proper motion of 10.3”/year. Even at that rate, Barnard’s Star will appear to move the angular diameter of a Full Moon only after 175 years. ...
Life Cycle of Stars: Chapter 21
... • Outer atmosphere ejected into space forming a planetary nebula • Star fades into a white dwarf • Eventually dies out as a black dwarf • Our sun is a low mass star • Cycle lasts for billions of years ...
... • Outer atmosphere ejected into space forming a planetary nebula • Star fades into a white dwarf • Eventually dies out as a black dwarf • Our sun is a low mass star • Cycle lasts for billions of years ...
iClicker Questions
... they are surrounded by clouds of gas and dust * c) they only emit infrared radiation d) they are all moving away from Earth so fast that their visible light is Doppler shifted into the infrared ...
... they are surrounded by clouds of gas and dust * c) they only emit infrared radiation d) they are all moving away from Earth so fast that their visible light is Doppler shifted into the infrared ...
Stars and the Sun
... Sun it collapses again into a black hole…so dense that not even light escapes! ...
... Sun it collapses again into a black hole…so dense that not even light escapes! ...
Stars - Denbigh Baptist Christian School
... Our Sun has diameter of 865,000 miles (1,400,000 km) This size makes it a medium-sized yellow star. Giant stars – 10’s – 100’s of times larger and 100’s times more luminous. Supergiants – 100’s times larger and 1000’s times more luminous. Next closest star to Earth is Proxima Centauri. This is 270,0 ...
... Our Sun has diameter of 865,000 miles (1,400,000 km) This size makes it a medium-sized yellow star. Giant stars – 10’s – 100’s of times larger and 100’s times more luminous. Supergiants – 100’s times larger and 1000’s times more luminous. Next closest star to Earth is Proxima Centauri. This is 270,0 ...
Document
... c) objects that are not quite massive enough to be stars d) cooled off white dwarfs e) the objects at the centers of planetary nebulae 29. What is not the same for each star in a cluster? a) age, b) mass, c) composition, d) distance from Earth 30. Nearly all the elements found in our environment wer ...
... c) objects that are not quite massive enough to be stars d) cooled off white dwarfs e) the objects at the centers of planetary nebulae 29. What is not the same for each star in a cluster? a) age, b) mass, c) composition, d) distance from Earth 30. Nearly all the elements found in our environment wer ...
Life Cycles of Stars
... form a protostar • Depending on the size of the star that forms, a different fate is met • Low and medium mass stars burn out to become white dwarfs • High mass stars burn out in an amazing explosion called a supernova, which gives birth to a new nebula ...
... form a protostar • Depending on the size of the star that forms, a different fate is met • Low and medium mass stars burn out to become white dwarfs • High mass stars burn out in an amazing explosion called a supernova, which gives birth to a new nebula ...
ASTR2050 Spring 2005 • In this class we will cover: Brief review
... Interlude: Naming stars Ordinary stars Greek letter (in order of brightness) then constellation e.g. α-Orionis is brightest star in Orion (aka Betelgeuse) δ-Cephei is fourth brightest star in Cepheus Variable stars Listed in order of discovery, starting with “R”, then “S” and on through “Z”, then “ ...
... Interlude: Naming stars Ordinary stars Greek letter (in order of brightness) then constellation e.g. α-Orionis is brightest star in Orion (aka Betelgeuse) δ-Cephei is fourth brightest star in Cepheus Variable stars Listed in order of discovery, starting with “R”, then “S” and on through “Z”, then “ ...
The Inverse Square Law and Surface Area
... stars and classify their power output and compare them with more distant stars The following very bright objects of known luminosity can be identified in distant galaxies • Cepheid Variable Stars ...
... stars and classify their power output and compare them with more distant stars The following very bright objects of known luminosity can be identified in distant galaxies • Cepheid Variable Stars ...
chapter 28 pages 747-752
... • 1. nebula- cloud of gas and dust • 2. Rotation causes formation of protostar • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during ...
... • 1. nebula- cloud of gas and dust • 2. Rotation causes formation of protostar • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during ...
No Slide Title
... of an object due to the movement of the observer. Remember looking at your finger through the left and then right eye? One parsec is the distance an object must be in order to have a parallax of one arc second. One parsec = 3.3 light years Alpha Centauri is the closest star. Most stars are too dista ...
... of an object due to the movement of the observer. Remember looking at your finger through the left and then right eye? One parsec is the distance an object must be in order to have a parallax of one arc second. One parsec = 3.3 light years Alpha Centauri is the closest star. Most stars are too dista ...
The Life Cycle of Stars
... The Death of a Star After spending approximately 10 billion years as a main sequence star, a star’s available hydrogen will have been converted to helium by nuclear fusion. -> helium-rich core->less hydrogen to burn->core begins to contract->heats the core->fusion restart in the outer layer->outer ...
... The Death of a Star After spending approximately 10 billion years as a main sequence star, a star’s available hydrogen will have been converted to helium by nuclear fusion. -> helium-rich core->less hydrogen to burn->core begins to contract->heats the core->fusion restart in the outer layer->outer ...
Integrative Studies 410 Our Place in the Universe
... – Example: Star with 4L and 3M uses 4 times more mass for energy production, but has 3 times more mass, so its life time is a factor ¾=0.75 compared to the sun: 7.5 billion years ([0.75] goes in the box) ...
... – Example: Star with 4L and 3M uses 4 times more mass for energy production, but has 3 times more mass, so its life time is a factor ¾=0.75 compared to the sun: 7.5 billion years ([0.75] goes in the box) ...
Introduction to Stars ppt
... Most stars fall along the main sequence – upper left to lower right. These stars fuse hydrogen into helium in their cores and have a wide range of life spans, which depend on their mass. Higher mass stars on main sequence have shorter life spans. A star has a limited supply of core hydrogen and ther ...
... Most stars fall along the main sequence – upper left to lower right. These stars fuse hydrogen into helium in their cores and have a wide range of life spans, which depend on their mass. Higher mass stars on main sequence have shorter life spans. A star has a limited supply of core hydrogen and ther ...
The Milky Way * A Classic Galaxy
... • Pop I: stars with metals, formed only after many supernovae enriched the interstellar medium and interstellar clouds with metals • Pop II, metal-poor stars, all in the bulge and halo • Pop I,II show MW formed spheroid first, then disk more gradually. • Hubble discovered Cepheids in Andromeda Nebul ...
... • Pop I: stars with metals, formed only after many supernovae enriched the interstellar medium and interstellar clouds with metals • Pop II, metal-poor stars, all in the bulge and halo • Pop I,II show MW formed spheroid first, then disk more gradually. • Hubble discovered Cepheids in Andromeda Nebul ...
Homework 4
... 1. If a protostar is forming out of a cold molecular cloud, how can its luminosity be upto one hundred times as large as the luminosity of the star it will become? ...
... 1. If a protostar is forming out of a cold molecular cloud, how can its luminosity be upto one hundred times as large as the luminosity of the star it will become? ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.