Southern cross Crux - The Southern Cross Crux, the Southern Cross
... Alpha Crucis is a double star, blue-white in color, with components of magnitude 1.4 and 1.9, separated by 4.4 arcseconds. It is the 14th brightest star in the sky. It is located 320 light-years from our solar system, and composed of two hot blue-white stars with luminosities 25,000 and 16,000 times ...
... Alpha Crucis is a double star, blue-white in color, with components of magnitude 1.4 and 1.9, separated by 4.4 arcseconds. It is the 14th brightest star in the sky. It is located 320 light-years from our solar system, and composed of two hot blue-white stars with luminosities 25,000 and 16,000 times ...
PPT - Mr.E Science
... Scientist have viewed thousands of galaxies and can measure the fact that all galaxies are moving away from each other. If you could run the film “backwards”, it would appear that all of the galaxies come together at a single incredibly dense point. Scientist CANNOT Explain where this dense point ca ...
... Scientist have viewed thousands of galaxies and can measure the fact that all galaxies are moving away from each other. If you could run the film “backwards”, it would appear that all of the galaxies come together at a single incredibly dense point. Scientist CANNOT Explain where this dense point ca ...
M = 5.5 - The Millstone
... Absolute Magnitude, we must have a measure of the stellar distance (by other means). Absolute magnitude, M, expresses the brightness of a star as it would be if it were placed 10 parsecs away. Since all stars would be placed at the same distance, absolute magnitudes show differences in actual lumino ...
... Absolute Magnitude, we must have a measure of the stellar distance (by other means). Absolute magnitude, M, expresses the brightness of a star as it would be if it were placed 10 parsecs away. Since all stars would be placed at the same distance, absolute magnitudes show differences in actual lumino ...
Mr. Scharff
... Introduction. The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were al the same distance away. Rather than speak of the ...
... Introduction. The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were al the same distance away. Rather than speak of the ...
Characteristics of Stars
... nuclear fusion is happening at their cores… they create their own light • Have different characteristics which allow many different ‘varieties’ of stars to exist ...
... nuclear fusion is happening at their cores… they create their own light • Have different characteristics which allow many different ‘varieties’ of stars to exist ...
Unit 1
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
Grade 6 Standard 4 - Murray School District
... Standard 4: Students will understand the scale of size, distance between objects, movement, and apparent motion (due to Earth’s rotation) of objects in the universe and how cultures have understood, related to and used these objects in the night sky. Objective 2: Describe the appearance and apparent ...
... Standard 4: Students will understand the scale of size, distance between objects, movement, and apparent motion (due to Earth’s rotation) of objects in the universe and how cultures have understood, related to and used these objects in the night sky. Objective 2: Describe the appearance and apparent ...
Stars - Madison County Schools
... • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
... • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
Review Guide
... 2. What is the name of our own galaxy? 3. What type is our galaxy? How big is it? ...
... 2. What is the name of our own galaxy? 3. What type is our galaxy? How big is it? ...
Astrophysics
... of Physics. The strength of gravity inside a black hole is so massive that nothing can escape, not even light (which is why they are not visible). The perimeter at which light can/cannot escape is called the Event Horizon, but far away from this point, everything else is sucked in. Black holes are i ...
... of Physics. The strength of gravity inside a black hole is so massive that nothing can escape, not even light (which is why they are not visible). The perimeter at which light can/cannot escape is called the Event Horizon, but far away from this point, everything else is sucked in. Black holes are i ...
Stars and the Main Sequence
... The generated heat will then exactly match the outgoing energy flow (luminosity) at any point in the star. Heat flows from hot to cold temperature gradient is required to carry the luminosity outward: Therefore T(r) and P(r) drop towards the surface (r) also drops ...
... The generated heat will then exactly match the outgoing energy flow (luminosity) at any point in the star. Heat flows from hot to cold temperature gradient is required to carry the luminosity outward: Therefore T(r) and P(r) drop towards the surface (r) also drops ...
Lab Document - University of Iowa Astronomy and Astrophysics
... (8) Now let’s try and find a “Deep Sky” object using the Pocket Sky Atlas. We will look at the object M13 in the constellation of Hercules. Using the Star Wheel and SC1 chart, find Hercules. Both the Star Wheel and the SC1 indicate where M13 is located. The Pocket Sky Atlas has a more detailed map o ...
... (8) Now let’s try and find a “Deep Sky” object using the Pocket Sky Atlas. We will look at the object M13 in the constellation of Hercules. Using the Star Wheel and SC1 chart, find Hercules. Both the Star Wheel and the SC1 indicate where M13 is located. The Pocket Sky Atlas has a more detailed map o ...
Stars and Galaxies
... And then there’s M31, the Andromeda galaxy — the most distant object that’s readily visible to human eyes. This great amalgamation of stars stands almost directly overhead late this evening. When viewed from a dark skywatching location, far from city lights, it looks like a faint, fuzzy blob. But th ...
... And then there’s M31, the Andromeda galaxy — the most distant object that’s readily visible to human eyes. This great amalgamation of stars stands almost directly overhead late this evening. When viewed from a dark skywatching location, far from city lights, it looks like a faint, fuzzy blob. But th ...
Introduction to the Earth
... Black holes If the star was bigger than 30 times the mass of the sun The left over core becomes so dense that light can’t escape its gravity. Becomes a black hole. Grab any nearby matter and get bigger As matter falls in, it gives off x-rays. That’s how they find them ...
... Black holes If the star was bigger than 30 times the mass of the sun The left over core becomes so dense that light can’t escape its gravity. Becomes a black hole. Grab any nearby matter and get bigger As matter falls in, it gives off x-rays. That’s how they find them ...
Create a HR Diagram - EarthSpaceScience
... 6. Where are giants on the graph in terms of luminosity? Why do you think this might be? ...
... 6. Where are giants on the graph in terms of luminosity? Why do you think this might be? ...
Integrative Studies 410 Our Place in the Universe
... – Assumed all stars have the same absolute brightness – Counts stars as a function of apparent magnitude – Brighter stars closer to us; fainter stars further away – Cut off in brightness corresponds to a cut off at a certain distance. ...
... – Assumed all stars have the same absolute brightness – Counts stars as a function of apparent magnitude – Brighter stars closer to us; fainter stars further away – Cut off in brightness corresponds to a cut off at a certain distance. ...
Sample Exam Questions
... b) the time required by light to travel to the nearest star beside the Sun c) the time required by sunlight to reach the Earth d) the distance traversed by a light beam in one year 2. Suppose that there are initially three competing, scientifically plausible explanations for a newly observed natural ...
... b) the time required by light to travel to the nearest star beside the Sun c) the time required by sunlight to reach the Earth d) the distance traversed by a light beam in one year 2. Suppose that there are initially three competing, scientifically plausible explanations for a newly observed natural ...
Word
... #1. Show that for the exponential function (P = P0enr), the number of investment cycles to double the original amount (P0) can be expressed as 69.3/r. Here P0 is the initial amount, “r” is the rate of growth in percent in a specific time period, and “n” is the total number of those periods that have ...
... #1. Show that for the exponential function (P = P0enr), the number of investment cycles to double the original amount (P0) can be expressed as 69.3/r. Here P0 is the initial amount, “r” is the rate of growth in percent in a specific time period, and “n” is the total number of those periods that have ...
HOMEWORK #1
... #1. Show that for the exponential function (P = P0enr), the number of investment cycles to double the original amount (P0) can be expressed as 69.3/r. Here P0 is the initial amount, “r” is the rate of growth in percent in a specific time period, and “n” is the total number of those periods that have ...
... #1. Show that for the exponential function (P = P0enr), the number of investment cycles to double the original amount (P0) can be expressed as 69.3/r. Here P0 is the initial amount, “r” is the rate of growth in percent in a specific time period, and “n” is the total number of those periods that have ...
angular size - Particle and Astroparticle Physics
... If you draw lines from your eye to each of two stars, the angle between these lines is the angular distance between these two stars ...
... If you draw lines from your eye to each of two stars, the angle between these lines is the angular distance between these two stars ...
Sky News – March 2015 The Realm of the Galaxies
... Familiar winter constellations like Orion begin to set in the west with the onset of darkness, bringing the spring constellations of Leo, Virgo, Coma Bernices and Ursa Major into prominence. It is within these that hosts of galaxies reside. The North Galactic Pole, the point in the sky directly over ...
... Familiar winter constellations like Orion begin to set in the west with the onset of darkness, bringing the spring constellations of Leo, Virgo, Coma Bernices and Ursa Major into prominence. It is within these that hosts of galaxies reside. The North Galactic Pole, the point in the sky directly over ...
Stars
... What is a star? • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
... What is a star? • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
Universe 19
... 1. How far away are the stars? 2. What evidence do astronomers have that the Sun is a typical star? 3. What is meant by a “first-magnitude” or “second-magnitude” star? 4. Why are some stars red and others blue? 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. W ...
... 1. How far away are the stars? 2. What evidence do astronomers have that the Sun is a typical star? 3. What is meant by a “first-magnitude” or “second-magnitude” star? 4. Why are some stars red and others blue? 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. W ...
Malmquist bias
The Malmquist bias is an effect in observational astronomy which leads to the preferential detection of intrinsically bright objects. It was first described in 1922 by Swedish astronomer Gunnar Malmquist (1893–1982), who then greatly elaborated upon this work in 1925. In statistics, this bias is referred to as a selection bias and affects the survey results in a brightness limited survey, where stars below a certain apparent brightness are not included. Since observed stars and galaxies appear dimmer when farther away, the brightness that is measured will fall off with distance until their brightness falls below the observational threshold. Objects which are more luminous, or intrinsically brighter, can be observed at a greater distance, creating a false trend of increasing intrinsic brightness, and other related quantities, with distance. This effect has led to many spurious claims in the field of astronomy. Properly correcting for these effects has become an area of great focus.