Section 2
... The Light-Year Distances on Earth’s surface are often measured in kilometers. However, distances to the stars are so large that kilometers are not very practical units. Astronomers use a unit called the light-year to measure distances between the stars. In space, light travels at a speed of about 30 ...
... The Light-Year Distances on Earth’s surface are often measured in kilometers. However, distances to the stars are so large that kilometers are not very practical units. Astronomers use a unit called the light-year to measure distances between the stars. In space, light travels at a speed of about 30 ...
FREE Sample Here
... Begin your discussion of seasons with an informal, multiple-choice pre-quiz. If you’d like to make this pre-assessment a bit more formal, author Paul Green discusses more ideas in his book Peer Instruction for Astronomy starting on page 11. He also includes “concept tests” for the seasons as well as ...
... Begin your discussion of seasons with an informal, multiple-choice pre-quiz. If you’d like to make this pre-assessment a bit more formal, author Paul Green discusses more ideas in his book Peer Instruction for Astronomy starting on page 11. He also includes “concept tests” for the seasons as well as ...
ASTRO-114--Lecture 40-
... very low mass, not too much material, it’s gonna be a small red star. If it had a lot of material that fell in, it’s gonna be a big, bright, hot star. And so that’s where you get that main sequence of the H-R diagram. All the stars become stars and the only difference from one star to another is how ...
... very low mass, not too much material, it’s gonna be a small red star. If it had a lot of material that fell in, it’s gonna be a big, bright, hot star. And so that’s where you get that main sequence of the H-R diagram. All the stars become stars and the only difference from one star to another is how ...
White dwarfs from GAIA: The 7th dimension
... • The white dwarf luminosity function of Gaia is a sensitive probe of the averaged star formation rate • Due to their very short main-sequence lifetimes the shape of the SFR can be reconstructed from the luminosity function of massive white dwarfs • To achieve these goals, we need R~5000 spectroscop ...
... • The white dwarf luminosity function of Gaia is a sensitive probe of the averaged star formation rate • Due to their very short main-sequence lifetimes the shape of the SFR can be reconstructed from the luminosity function of massive white dwarfs • To achieve these goals, we need R~5000 spectroscop ...
Constellation Detection
... Fig. 2 Image Preprocessing Result. (a) Raw test image; (b) between constellations is astronautically invariant. Thus we after preprocessing, only stars are preserved record the first five nearest constellations as “neighbors” and store them as part of database. The final template of Gemini is shown ...
... Fig. 2 Image Preprocessing Result. (a) Raw test image; (b) between constellations is astronautically invariant. Thus we after preprocessing, only stars are preserved record the first five nearest constellations as “neighbors” and store them as part of database. The final template of Gemini is shown ...
Notes in pdf format
... • Conservation laws are very important • They are also useful for solving Problems • We have talked about several of them: Energy conservation Linear momentum conservation Angular momentum conservation ...
... • Conservation laws are very important • They are also useful for solving Problems • We have talked about several of them: Energy conservation Linear momentum conservation Angular momentum conservation ...
Lecture 22 - Cosmic distance scale
... Expansion of the Universe • Blow up the balloon to about a 3 inch diameter. Twist the neck and hold it closed so that no air escapes, but do NOT make a knot because you will need to blow it up some more. Make SIX dots on its surface to represent galaxies and label them A-F. • Measure and record the ...
... Expansion of the Universe • Blow up the balloon to about a 3 inch diameter. Twist the neck and hold it closed so that no air escapes, but do NOT make a knot because you will need to blow it up some more. Make SIX dots on its surface to represent galaxies and label them A-F. • Measure and record the ...
Exoplanet Discoveries and the Fermi Paradox
... their lives, they migrate to the giant or supergiant phase, then to white dwarfs, neutron stars, or black holes. Our sun is a G2 star on the main sequence, brighter and more massive than about 90% of all stars. Astronomers classify stars according to their intrinsic brightness and temperature into c ...
... their lives, they migrate to the giant or supergiant phase, then to white dwarfs, neutron stars, or black holes. Our sun is a G2 star on the main sequence, brighter and more massive than about 90% of all stars. Astronomers classify stars according to their intrinsic brightness and temperature into c ...
1 1. The Solar System
... Celestial Sphere: The celestial sphere is an imaginary shell of infinite radius, centered on the observer. This concept is useful for determining positions in the sky. Zenith: This is the point in the sky directly above the observer. Celestial Poles: As the Earth rotates, the sky appears to rotate a ...
... Celestial Sphere: The celestial sphere is an imaginary shell of infinite radius, centered on the observer. This concept is useful for determining positions in the sky. Zenith: This is the point in the sky directly above the observer. Celestial Poles: As the Earth rotates, the sky appears to rotate a ...
Exoplanets - An ESO/OPTICON/IAU summer school on modern
... 3. What is an (exo)planet? "A planet is a celestial body that: (a) is in orbit around the Sun (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit." IAU, R ...
... 3. What is an (exo)planet? "A planet is a celestial body that: (a) is in orbit around the Sun (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit." IAU, R ...
Logarithms and Earthquake Magnitude
... This is clearly an improvement, but still a bit difficult to work with. Logarithms provide a convenient way to deal with numbers that span a large range. In the case of earthquakes, the Richter magnitude scale has been defined as follows: Magnitude = log10 (A / Azero), where A is the amplitude measu ...
... This is clearly an improvement, but still a bit difficult to work with. Logarithms provide a convenient way to deal with numbers that span a large range. In the case of earthquakes, the Richter magnitude scale has been defined as follows: Magnitude = log10 (A / Azero), where A is the amplitude measu ...
Unit 4 Space
... Ancient civilizations studied the night sky for patterns, and created many myths based on patterns they recognized from their lives. • The night sky appears to be flat because of the huge distances between stars, but actually the stars in one constellation can be several thousand, or even millions, ...
... Ancient civilizations studied the night sky for patterns, and created many myths based on patterns they recognized from their lives. • The night sky appears to be flat because of the huge distances between stars, but actually the stars in one constellation can be several thousand, or even millions, ...
Kepler-452b is not a new Earth A twin of the Sun
... Another interesting structure clearly visible on Charon is a dark region about 320 km across, located next to the north pole, whose origin is so far unknown. Thanks to the images of Pluto’s disk taken by LORRI in the first half of July, planetary scientists were able to definitely solve the outstand ...
... Another interesting structure clearly visible on Charon is a dark region about 320 km across, located next to the north pole, whose origin is so far unknown. Thanks to the images of Pluto’s disk taken by LORRI in the first half of July, planetary scientists were able to definitely solve the outstand ...
Glossary of terms - Universal Workshop
... at sunset, and includes all the points which will be overhead till midnight. The meridian overhead at midnight (i.e. opposite to the Sun) is the dividing line between evening and morning sky. At sunset, you are on the side of the Earth facing backward in the orbital direction around the Sun; so the ...
... at sunset, and includes all the points which will be overhead till midnight. The meridian overhead at midnight (i.e. opposite to the Sun) is the dividing line between evening and morning sky. At sunset, you are on the side of the Earth facing backward in the orbital direction around the Sun; so the ...
Here - Astrophysics Research Institute
... As the earth rotates, stars (like the sun) rise in the east, pass over the meridian (transit), and set in the west. The hour angle tells you how long it will be before the star transits (or how much time has passed since it transited!) • Hour Angle - angle between a star's current position and the m ...
... As the earth rotates, stars (like the sun) rise in the east, pass over the meridian (transit), and set in the west. The hour angle tells you how long it will be before the star transits (or how much time has passed since it transited!) • Hour Angle - angle between a star's current position and the m ...
The Dual Nature of Light
... Basic Properties of Light: • interference[max at dsinθ = mλ] gives location of lines in spectrograph - for a grating with 12000 slits/inch, d=21,000Å ...
... Basic Properties of Light: • interference[max at dsinθ = mλ] gives location of lines in spectrograph - for a grating with 12000 slits/inch, d=21,000Å ...
Document
... • ~6% of normal solar-type stars have giant planets • ~10% or more of stars with masses ~1.5 M סּhave giant planets that tend to be more massive (more on this later in the course) • < 1% of the M dwarfs stars (low mass) have giant planets, but may have a large population of neptune-mass planets → l ...
... • ~6% of normal solar-type stars have giant planets • ~10% or more of stars with masses ~1.5 M סּhave giant planets that tend to be more massive (more on this later in the course) • < 1% of the M dwarfs stars (low mass) have giant planets, but may have a large population of neptune-mass planets → l ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.