Colonization of the Milky Way The distances between the stars are
... They wouldn’t even have to do it themselves. Another possibility would be to send selfreplicating machines that make copies of themselves from the local resources of any system they found. Incidentally, this argument does not work when we consider the distances between galaxies. For example, the nea ...
... They wouldn’t even have to do it themselves. Another possibility would be to send selfreplicating machines that make copies of themselves from the local resources of any system they found. Incidentally, this argument does not work when we consider the distances between galaxies. For example, the nea ...
A Star is Born!
... • The intense radiation from hot, young stars ionizes the gaseous interstellar medium surrounding it — this is known as an HII region ...
... • The intense radiation from hot, young stars ionizes the gaseous interstellar medium surrounding it — this is known as an HII region ...
IB_Op_F_04 - Effectsmeister
... In general, what is the relationship between the temperature of a star and its brightness? Most of the stars seem to be along a line from the upper left corner to the lower right corner of the HR Diagram. Stars which fall into this category of stars are called main sequence stars . Does our Sun fit ...
... In general, what is the relationship between the temperature of a star and its brightness? Most of the stars seem to be along a line from the upper left corner to the lower right corner of the HR Diagram. Stars which fall into this category of stars are called main sequence stars . Does our Sun fit ...
Define the following terms in the space provided
... Gregorian year 365.2425 days Earth mass 5.9736× 1024 kilograms Sun mass 1.9891× 1030 kg = 332,980 × Earth mean Earth radius 6371 kilometers Sun radius 6.96265 × 105 km = 109 × Earth Sun luminosity 3.827× 1026 watts ...
... Gregorian year 365.2425 days Earth mass 5.9736× 1024 kilograms Sun mass 1.9891× 1030 kg = 332,980 × Earth mean Earth radius 6371 kilometers Sun radius 6.96265 × 105 km = 109 × Earth Sun luminosity 3.827× 1026 watts ...
12 The Milky Way - Journigan-wiki
... Population I and II Groups Population I and II stars differ in almost every respect: age, color, location, motion and composition. Population I stars are younger, averaging from 106 to 109 years old. Most are blue and lie in the galactic disk following approximately circular orbits. Their compositi ...
... Population I and II Groups Population I and II stars differ in almost every respect: age, color, location, motion and composition. Population I stars are younger, averaging from 106 to 109 years old. Most are blue and lie in the galactic disk following approximately circular orbits. Their compositi ...
ASTRONOMY 1303 Syllabus Fall 2015
... Astronomy is the oldest science. For centuries humans have looked up at the sky and wondered about their place in the universe. Today we are in the midst of an explosion of knowledge regarding our place in the universe. New technology has revolutionized the way astronomers “see” the universe. The ai ...
... Astronomy is the oldest science. For centuries humans have looked up at the sky and wondered about their place in the universe. Today we are in the midst of an explosion of knowledge regarding our place in the universe. New technology has revolutionized the way astronomers “see” the universe. The ai ...
Main Sequence stars
... The star Rigel is about 100,000 times brighter than the Sun and belongs to spectral type B8. The star Sirius B is about 3000 times dimmer than the Sun and also belongs to spectral type B8. Which star has the greatest surface temperature? ...
... The star Rigel is about 100,000 times brighter than the Sun and belongs to spectral type B8. The star Sirius B is about 3000 times dimmer than the Sun and also belongs to spectral type B8. Which star has the greatest surface temperature? ...
Sample Midterm - IUPUI Physics
... 8. In the convective zone of the sun energy is primarily transferred through: a) radiating it upwards b) conducting it through the material c) moving the material it is in d) none of the above the energy is not transferred 9. While a star is in the process of being born it is called a: a) brown dwar ...
... 8. In the convective zone of the sun energy is primarily transferred through: a) radiating it upwards b) conducting it through the material c) moving the material it is in d) none of the above the energy is not transferred 9. While a star is in the process of being born it is called a: a) brown dwar ...
Galaxies • Test 3 (New date) – Thurs, 9 April
... A gas cloud moves under influence of the gravity of the galaxy. The gas cloud moves once around the galaxy in a specified orbit. If the time is short, the mass of the galaxy is greater. Write an equivalent statement for the galaxy NGC 3672 Mass ...
... A gas cloud moves under influence of the gravity of the galaxy. The gas cloud moves once around the galaxy in a specified orbit. If the time is short, the mass of the galaxy is greater. Write an equivalent statement for the galaxy NGC 3672 Mass ...
PDF version
... sunshine each day – is actually a star? Stars are made out of something called plasma, and are held together by their own gravity. A star is created in an interstellar cloud, where lots of dust and gas are floating in space. It can take up to one million years for a star to be born, but once it take ...
... sunshine each day – is actually a star? Stars are made out of something called plasma, and are held together by their own gravity. A star is created in an interstellar cloud, where lots of dust and gas are floating in space. It can take up to one million years for a star to be born, but once it take ...
Chapter 15
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
Topics for Today`s Class Luminosity Equation The Heart of
... • The stars of the upper main sequence are indeed larger than the Sun, as predicted by the H–R diagram. • The examples shown here are flattened by rapid rotation, but most stars rotate slower and are more nearly spherical. • On the scale of this diagram, the supergiant Betelgeuse would have a diamet ...
... • The stars of the upper main sequence are indeed larger than the Sun, as predicted by the H–R diagram. • The examples shown here are flattened by rapid rotation, but most stars rotate slower and are more nearly spherical. • On the scale of this diagram, the supergiant Betelgeuse would have a diamet ...
The future sun March 18 −
... • Fri & Sat, 9-11pm, if it is not cloudy. • Mar 18 & 19 • Apr 15 & 16 • May 13 & 14 • 24-inch telescope in dome • small telescopes outside ...
... • Fri & Sat, 9-11pm, if it is not cloudy. • Mar 18 & 19 • Apr 15 & 16 • May 13 & 14 • 24-inch telescope in dome • small telescopes outside ...
Rotation in the ZAMS: Be and Bn stars
... We show that Be stars belong to a high velocity tail of a single B-type star rotational velocity distribution in the MS. This implies that: 1) the number fraction N(Be)/N(Be+B) is independent of the mass; 2) Bn stars having ZAMS rotational velocities higher than a given limit might become Be stars. ...
... We show that Be stars belong to a high velocity tail of a single B-type star rotational velocity distribution in the MS. This implies that: 1) the number fraction N(Be)/N(Be+B) is independent of the mass; 2) Bn stars having ZAMS rotational velocities higher than a given limit might become Be stars. ...
Astrophysics
... If galaxies are moving away from us, they must have been closer together millions of years ago. If Hubble’s graph is used, the origin of this movement = approx. 10 000 million years old ...
... If galaxies are moving away from us, they must have been closer together millions of years ago. If Hubble’s graph is used, the origin of this movement = approx. 10 000 million years old ...
Astronomical Ideas Fall 2012 Homework 4 Solutions 1. Two stars
... ii. temperature: Distance doesnʼt need to be known. Temperature can be estimated directly from a starʼs color, or its spectrum. iii. color: Distance doesnʼt need to be known. The color can be directly observed for a star from images. iv. chemical composition: Distance doesnʼt need to be known to inf ...
... ii. temperature: Distance doesnʼt need to be known. Temperature can be estimated directly from a starʼs color, or its spectrum. iii. color: Distance doesnʼt need to be known. The color can be directly observed for a star from images. iv. chemical composition: Distance doesnʼt need to be known to inf ...
8.1 Stars
... neutrons only about 15 km across, it is called a neutron star. Neutron stars are made of the densest material known ...
... neutrons only about 15 km across, it is called a neutron star. Neutron stars are made of the densest material known ...
CHAPTER 32 1. What is happening inside a star that isn`t happening
... 59. Is the Big Bang theory still accepted by astronomers? Does it explain the expanding universe and other observations in the sky? Is it consistent with the idea that the universe is a fe ...
... 59. Is the Big Bang theory still accepted by astronomers? Does it explain the expanding universe and other observations in the sky? Is it consistent with the idea that the universe is a fe ...
Lecture 12, PPT version
... Spherical groupings of 10,000 to 1 million stars (about 158 known in our Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
... Spherical groupings of 10,000 to 1 million stars (about 158 known in our Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
![Session: [B5B-3] S3 : Stars, Exoplanets and Stellar Systems Date](http://s1.studyres.com/store/data/007747311_2-a6f8878211ea1c8526dde4b9d41aac5c-300x300.png)
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.