Powerpoint
... • Sun is a marble, Earth is a grain of sand orbiting 1 m away. • Nearest star is another marble 270 km away. • Solar system extends about 50 m from the Sun; rest of distance to nearest star is basically empty. ...
... • Sun is a marble, Earth is a grain of sand orbiting 1 m away. • Nearest star is another marble 270 km away. • Solar system extends about 50 m from the Sun; rest of distance to nearest star is basically empty. ...
Ch 11c and 12 ( clusters 3-31-11)
... cluster now has no stars with life expectancy less than around 100 million years ...
... cluster now has no stars with life expectancy less than around 100 million years ...
Compact stars
... insufficient to counterbalance gravity and a catastrophic gravitational collapse occurs in milliseconds. The escape velocity at the surface, already at least 1/3 light speed, quickly reaches the velocity of light. No energy or matter can escape: a black hole has been created. All light will be trapp ...
... insufficient to counterbalance gravity and a catastrophic gravitational collapse occurs in milliseconds. The escape velocity at the surface, already at least 1/3 light speed, quickly reaches the velocity of light. No energy or matter can escape: a black hole has been created. All light will be trapp ...
The Hertzsprung-Russell Diagram
... • V: Main-sequence stars – The full classification of a star includes both a spectral type and a luminosity class: • The Sun is a G2 V • Proxima Centauri is M5 V • Betelgeuse is M2 I • Sirius A: A1 V • Sirius B: DA2 V ...
... • V: Main-sequence stars – The full classification of a star includes both a spectral type and a luminosity class: • The Sun is a G2 V • Proxima Centauri is M5 V • Betelgeuse is M2 I • Sirius A: A1 V • Sirius B: DA2 V ...
The Stellar Cycle
... WD has a size slightly less than that of the earth. It is so dense, one teaspoon weights 15 tons! WD from an isolated star will simply cool, temperature dropping until it is no ...
... WD has a size slightly less than that of the earth. It is so dense, one teaspoon weights 15 tons! WD from an isolated star will simply cool, temperature dropping until it is no ...
Observations of V838 Mon light echo
... small amount of matter located above being ejected into space has a mass of 1/1000 or 1/10000 solar masses. When the ejected gas expands, its density decreases rapidly, it passes into the optically thin state and gets ionized by the hard radiation of the hot dwarf surface. On the contrary, if hydrog ...
... small amount of matter located above being ejected into space has a mass of 1/1000 or 1/10000 solar masses. When the ejected gas expands, its density decreases rapidly, it passes into the optically thin state and gets ionized by the hard radiation of the hot dwarf surface. On the contrary, if hydrog ...
Scientific Notation Worksheet
... Directions: You can earn 5 extra credit points on your test if you complete this ENTIRE study guide. Every question must have an answer – no blanks allowed! If you do not know the answer to a question, you must make an effort to find it – ask your friends, look in your book, search the internet, ask ...
... Directions: You can earn 5 extra credit points on your test if you complete this ENTIRE study guide. Every question must have an answer – no blanks allowed! If you do not know the answer to a question, you must make an effort to find it – ask your friends, look in your book, search the internet, ask ...
Magnitudes lesson plan
... magnitude six, and the other visible stars were arbitrarily placed between magnitudes one and six according to their apparent brightness. Apparent Magnitude refers to the apparent brightness of one star relative to another as seen with the unaided eye. Keep in mind this refers to the apparent bright ...
... magnitude six, and the other visible stars were arbitrarily placed between magnitudes one and six according to their apparent brightness. Apparent Magnitude refers to the apparent brightness of one star relative to another as seen with the unaided eye. Keep in mind this refers to the apparent bright ...
October 2014 - Newbury Astronomical Society
... brown the coolest and blue the hottest). A star like our Sun is a normal medium sized ‘G’ Type star about half way through its stable life span so its position is shown almost at the centre of the diagram. Because the Sun is in its middle age it is stable (in fact very stable compared with many othe ...
... brown the coolest and blue the hottest). A star like our Sun is a normal medium sized ‘G’ Type star about half way through its stable life span so its position is shown almost at the centre of the diagram. Because the Sun is in its middle age it is stable (in fact very stable compared with many othe ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... Combine parallax and brightness Canopus has twice the parallax of Spica. Since distance α 1 / parallax, Spica must be at twice the distance of Canopus. (The numbers are 100 pc and 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant a ...
... Combine parallax and brightness Canopus has twice the parallax of Spica. Since distance α 1 / parallax, Spica must be at twice the distance of Canopus. (The numbers are 100 pc and 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant a ...
20_LectureOutline
... Its path across the H-R diagram is essentially a straight line—it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
... Its path across the H-R diagram is essentially a straight line—it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
29-4 - Fremont Peak Observatory
... been Secretary, Treasurer and President before retiring from the FPOA Board at the end of 2012. Rick has also been the principal liaison between State Parks and the FPOA during his tenure as resident ranger at the Peak and as a member of the board. No one could hope to equal the decades of service a ...
... been Secretary, Treasurer and President before retiring from the FPOA Board at the end of 2012. Rick has also been the principal liaison between State Parks and the FPOA during his tenure as resident ranger at the Peak and as a member of the board. No one could hope to equal the decades of service a ...
9 Measuring the properties of stars - Journigan-wiki
... It offers a simple, pictorial summary of stellar properties. Most stars lie on the main sequence with the hotter stars being more luminous. Blue stars are hottest while red stars are the coolest A star’s mass determines its location along the main sequence with more massive stars located at the top. ...
... It offers a simple, pictorial summary of stellar properties. Most stars lie on the main sequence with the hotter stars being more luminous. Blue stars are hottest while red stars are the coolest A star’s mass determines its location along the main sequence with more massive stars located at the top. ...
Sample Stellar Evolution TEST QUESTIONS
... 11. The Orion region contains young main sequence stars and an emission nebula. 12. The thermal motions of the atoms in a gas cloud can make it collapse to form a protostar. 13. The pressure of a gas generally depends on its temperature and its density. 14. Stars swell into giants when hydrogen is e ...
... 11. The Orion region contains young main sequence stars and an emission nebula. 12. The thermal motions of the atoms in a gas cloud can make it collapse to form a protostar. 13. The pressure of a gas generally depends on its temperature and its density. 14. Stars swell into giants when hydrogen is e ...
Galactic Structure
... different elemental ratios than do field halo stars… Milky Way field stars ...
... different elemental ratios than do field halo stars… Milky Way field stars ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.