Astronomy Practice Test
... 7. Why are distances in space often measured in light years? A. The light year is a commonly used unit of measure. B. Distances in space are so great that a large unit is needed. C. Scientists always use metric units like light years. D. Light years are easy to measure and understand. 8. Early astro ...
... 7. Why are distances in space often measured in light years? A. The light year is a commonly used unit of measure. B. Distances in space are so great that a large unit is needed. C. Scientists always use metric units like light years. D. Light years are easy to measure and understand. 8. Early astro ...
III - National Optical Astronomy Observatory
... proposal was selected to receive time (there are always more requests than there is telescope time).They made their observations with the same telescope that you will use when you come to Kitt Peak. This double cluster has been known since antiquity: it is possible to see it without a telescope in a ...
... proposal was selected to receive time (there are always more requests than there is telescope time).They made their observations with the same telescope that you will use when you come to Kitt Peak. This double cluster has been known since antiquity: it is possible to see it without a telescope in a ...
The Planets in our Solar System Solar System Basics
... – Gaseous • About 15 times larger than Earth • Composed of hydrogen and helium – Light, very low density – Jupiter, Saturn, Uranus, Neptune ...
... – Gaseous • About 15 times larger than Earth • Composed of hydrogen and helium – Light, very low density – Jupiter, Saturn, Uranus, Neptune ...
What is a Red Shift?
... humans. Describe some situations where the sun helps us as humans, with our community, and our way of living. ...
... humans. Describe some situations where the sun helps us as humans, with our community, and our way of living. ...
Stars Galaxies Sun
... As matter and energy moved outward, the force of gravity had an effect Matter began to condense, forming the galaxies The galaxies continued to move outward, as they continue to do today… ...
... As matter and energy moved outward, the force of gravity had an effect Matter began to condense, forming the galaxies The galaxies continued to move outward, as they continue to do today… ...
Lecture 9
... • Absolute magnitude describes stellar luminosities – Its what the stars apparent magnitude would be if it were 10 parsecs away ...
... • Absolute magnitude describes stellar luminosities – Its what the stars apparent magnitude would be if it were 10 parsecs away ...
Stellar Evolution (Powerpoint) 17
... fusion at once. What a star normally takes billions of years to burn, this star burns all at once. BIG explosion! ...
... fusion at once. What a star normally takes billions of years to burn, this star burns all at once. BIG explosion! ...
1. absolute brightness -
... 1. absolute brightness • the brightness a star would have if it were 10 parsecs from Earth ...
... 1. absolute brightness • the brightness a star would have if it were 10 parsecs from Earth ...
Stars on the HR Diagram
... 1. Plot the Absolute Magnitude (luminosity/intrinsic brightness) versus Temperature (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, ...
... 1. Plot the Absolute Magnitude (luminosity/intrinsic brightness) versus Temperature (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, ...
幻灯片 1
... Features of DS Stars Hydrogen-burning stage with 1.5-2.5 solar mass Short-period ...
... Features of DS Stars Hydrogen-burning stage with 1.5-2.5 solar mass Short-period ...
Day-7
... Work with a partner Read the instructions and questions carefully Discuss your answers with each other. ...
... Work with a partner Read the instructions and questions carefully Discuss your answers with each other. ...
Binary Star Systems
... It’s difficult to tell whether a binary system may have a third star orbiting far away. This star is still effected by the systems gravity, but it may take hundreds of years to pass through one orbit. For example, astronomers hypothesize that our Sun may have a “stellar companion” of low mass ...
... It’s difficult to tell whether a binary system may have a third star orbiting far away. This star is still effected by the systems gravity, but it may take hundreds of years to pass through one orbit. For example, astronomers hypothesize that our Sun may have a “stellar companion” of low mass ...
Energy Transport
... Regulation of Energy Production • If the energy production were to be insufficient then temp of core would decrease. • Pressure would decrease which would cause star to contract causing temp to increase again because of energy release from gravity. • If energy production were to be too much then th ...
... Regulation of Energy Production • If the energy production were to be insufficient then temp of core would decrease. • Pressure would decrease which would cause star to contract causing temp to increase again because of energy release from gravity. • If energy production were to be too much then th ...
Stellar Evolution
... remaining core is compressed into an infinitely small, infinitely dense black hole. Black hole’s have such a strong gravitational pull that even light can not escape if it gets any closer than the event horizon. The radius, R, at which a body of mass M must be contracted to in order to form a bl ...
... remaining core is compressed into an infinitely small, infinitely dense black hole. Black hole’s have such a strong gravitational pull that even light can not escape if it gets any closer than the event horizon. The radius, R, at which a body of mass M must be contracted to in order to form a bl ...
class17
... The relationship between apparent brightness and luminosity depends on distance… luminosity brightness 4 (distance ) 2 ...
... The relationship between apparent brightness and luminosity depends on distance… luminosity brightness 4 (distance ) 2 ...
What`s Up - April 2016
... Alphard is one of the ‘bright giants’ in our neighbourhood. But our ‘neighbourhood’ is rather large. Alphard is 11 million times as far away from us as our own sun – so it looks a lot dimmer to us! To the south of Sirius, and nearly overhead, is Canopus, second brightest star in the sky, lighting th ...
... Alphard is one of the ‘bright giants’ in our neighbourhood. But our ‘neighbourhood’ is rather large. Alphard is 11 million times as far away from us as our own sun – so it looks a lot dimmer to us! To the south of Sirius, and nearly overhead, is Canopus, second brightest star in the sky, lighting th ...