Foundation 1 - Discovering Astronomy
... • First detected in 1967 by Cambridge University graduate student Jocelyn Bell. • She found a radio source with a regular on-off-on cycle of exactly 1.3373011 seconds. • Some scientists speculated that this was evidence of an alien civilization’s communication system and dubbed the source LGM (Littl ...
... • First detected in 1967 by Cambridge University graduate student Jocelyn Bell. • She found a radio source with a regular on-off-on cycle of exactly 1.3373011 seconds. • Some scientists speculated that this was evidence of an alien civilization’s communication system and dubbed the source LGM (Littl ...
Chapter 8: The Pennsylvanian Period in Alabama: Looking Up
... milion years! Rigel Kentaurus (Rigel Kent for short, also known as Alpha Centauri) is currently the nearest star (it is a system of 3). It is 4.3 light years away and is the third brightest star in the night sky. It is also thought to be almost 5 billion years old.8 Because Rigel Kent's three stars ...
... milion years! Rigel Kentaurus (Rigel Kent for short, also known as Alpha Centauri) is currently the nearest star (it is a system of 3). It is 4.3 light years away and is the third brightest star in the night sky. It is also thought to be almost 5 billion years old.8 Because Rigel Kent's three stars ...
Powerpoint
... These are Brown Dwarfs or failed stars. Very difficult to detect because so faint. First seen in 1994 with Palomar 200”. How many are there? ...
... These are Brown Dwarfs or failed stars. Very difficult to detect because so faint. First seen in 1994 with Palomar 200”. How many are there? ...
The Pennsylvanian Period in Alabama: Looking Up Astronomy and
... to ask where it was at that time. Although Rigel Kent's orbit is close to ours, its distance from us and its direction in the sky vary considerably over time. 310 million years ago, it was 2,900 light years away and not visible to the naked eye. Extrapolating back we discover that Rigel Kent is clos ...
... to ask where it was at that time. Although Rigel Kent's orbit is close to ours, its distance from us and its direction in the sky vary considerably over time. 310 million years ago, it was 2,900 light years away and not visible to the naked eye. Extrapolating back we discover that Rigel Kent is clos ...
Chapter 13 section 3
... the time it reaches 100 million K, the star is huge. Its outer layers are much cooler than when it was a main sequence star. In about 5 billion years, the Sun will become a giant. ...
... the time it reaches 100 million K, the star is huge. Its outer layers are much cooler than when it was a main sequence star. In about 5 billion years, the Sun will become a giant. ...
The H-R Diagram
... muons), and many more particles you don’t hear about much because they decay rapidly in ordinary circumstances… • Radioactive carbon-14 is also created (in trace amounts) by cosmic ray collisions producing free neutrons acting on ordinary nitrogen in our atmosphere. This C14 has a half-life of 5,730 ...
... muons), and many more particles you don’t hear about much because they decay rapidly in ordinary circumstances… • Radioactive carbon-14 is also created (in trace amounts) by cosmic ray collisions producing free neutrons acting on ordinary nitrogen in our atmosphere. This C14 has a half-life of 5,730 ...
Lecture 9a: More on Star formation and evolution 10/22
... 3. Higher Mass also evolve faster - highest mass only “live” a few million years - Sun will “live” about 10 billion years - lower mass stars “live” 100 billion years ...
... 3. Higher Mass also evolve faster - highest mass only “live” a few million years - Sun will “live” about 10 billion years - lower mass stars “live” 100 billion years ...
ILÍDIO LOPES ()
... In these layers we have an intricate web of different processes occurring and interacting in the same region and in the same time scale: convection, magnetic fields and pulsations. Beneath the stellar surface (a few percent of the star’s radius) this interaction becomes even more complicated due to ...
... In these layers we have an intricate web of different processes occurring and interacting in the same region and in the same time scale: convection, magnetic fields and pulsations. Beneath the stellar surface (a few percent of the star’s radius) this interaction becomes even more complicated due to ...
Sample Stellar Evolution TEST QUESTIONS
... 7. Nuclear fusion in stars is controlled by the dependence of density on mass. 8. The Sun has a core in which energy travels outward primarily by radiation. 9. Energy flows by radiation or convection inside stars but almost never by conduction. 10. Hydrostatic equilibrium refers to the balance betwe ...
... 7. Nuclear fusion in stars is controlled by the dependence of density on mass. 8. The Sun has a core in which energy travels outward primarily by radiation. 9. Energy flows by radiation or convection inside stars but almost never by conduction. 10. Hydrostatic equilibrium refers to the balance betwe ...
D1 Stellar quantities (PPT)
... Stars initially form when gravity causes the gas in a nebula to condense. As the atoms move towards one another, they lose gravitational PE that is converted into KE. This raises the temperature of the atoms which then form a protostar. When the mass of the protostar is large enough, the temperature ...
... Stars initially form when gravity causes the gas in a nebula to condense. As the atoms move towards one another, they lose gravitational PE that is converted into KE. This raises the temperature of the atoms which then form a protostar. When the mass of the protostar is large enough, the temperature ...
the rest of the univ..
... Spectra and photometric data have been obtained for 5145 Pholus. Its albedo is very low (less than 0.1). Its spectra indicates the presence of organic compounds, which are often very dark (e.g. the nucleus of Comet Halley). Some believe that Triton, Pluto and its moon Charon are merely the largest e ...
... Spectra and photometric data have been obtained for 5145 Pholus. Its albedo is very low (less than 0.1). Its spectra indicates the presence of organic compounds, which are often very dark (e.g. the nucleus of Comet Halley). Some believe that Triton, Pluto and its moon Charon are merely the largest e ...
Galactic Structure
... removal from star formation, not by star formation Why are many (most?) stars a few Gyr old? Special epoch of inflow/interactions? Tie to formation of the Local Group (Silk, Wyse & Shields ...
... removal from star formation, not by star formation Why are many (most?) stars a few Gyr old? Special epoch of inflow/interactions? Tie to formation of the Local Group (Silk, Wyse & Shields ...
dtu7ech01 - Fort Thomas Independent Schools
... Ancient constellations were imaginary pictures outlined by familiar patterns of stars. ...
... Ancient constellations were imaginary pictures outlined by familiar patterns of stars. ...
Stars - WhatisOutThere
... brighter than the faint glow coming from the stars. If you were standing on the moon for example, you would be able to see the stars both day and night. This is because there is no atmosphere on the moon, meaning that it is always dark. Therefore you can see the stars. ...
... brighter than the faint glow coming from the stars. If you were standing on the moon for example, you would be able to see the stars both day and night. This is because there is no atmosphere on the moon, meaning that it is always dark. Therefore you can see the stars. ...
DTU 8e Chap 11 Characterizing Stars
... nearer stars can be determined by stellar parallax, which is the apparent shift of a star’s location against the background stars while Earth moves along its orbit around the Sun. The distances to more remote stars are determined using spectroscopic parallax. The apparent magnitude of a star, denote ...
... nearer stars can be determined by stellar parallax, which is the apparent shift of a star’s location against the background stars while Earth moves along its orbit around the Sun. The distances to more remote stars are determined using spectroscopic parallax. The apparent magnitude of a star, denote ...
Properties of Stars - Indiana State University
... – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given luminosity, the larger the radius, the smaller the temperature – Therefore, as one moves right on the H-R diagram, a star’s radius must increase – The net effect of this is that the smal ...
... – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given luminosity, the larger the radius, the smaller the temperature – Therefore, as one moves right on the H-R diagram, a star’s radius must increase – The net effect of this is that the smal ...
Astronomy Part 1 - Malvern Troop 7
... b) Identify at least eight conspicuous stars, five of which are of magnitude 1 or brighter. c) Make two sketches of the Big Dipper. In one sketch, show the Big Dipper's orientation in the early evening sky. In another sketch, show its position several hours later. In both sketches, show the North St ...
... b) Identify at least eight conspicuous stars, five of which are of magnitude 1 or brighter. c) Make two sketches of the Big Dipper. In one sketch, show the Big Dipper's orientation in the early evening sky. In another sketch, show its position several hours later. In both sketches, show the North St ...
1. This question is about some of the properties of Barnard`s star
... On the diagram above, identify the (i) (ii) (iii) ...
... On the diagram above, identify the (i) (ii) (iii) ...
Globular Clusters
... The second best glob visible from the Northern hemisphere, and it's still a good one here! Often overlooked as it does not get higher than 40 degrees here, and is only high for a short time. Well work a look, but catch it very early in the evening this time of year. M13. Easy in Binoculars, but bare ...
... The second best glob visible from the Northern hemisphere, and it's still a good one here! Often overlooked as it does not get higher than 40 degrees here, and is only high for a short time. Well work a look, but catch it very early in the evening this time of year. M13. Easy in Binoculars, but bare ...
The Lifecycle of the Stars
... Like all stars small to medium stars start their lives the same way… as a nebula. The second stage of a star is called a Protostar. (or known as a pre-star) ...
... Like all stars small to medium stars start their lives the same way… as a nebula. The second stage of a star is called a Protostar. (or known as a pre-star) ...
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.