PHYS-638-07f: Problem set #0 Solutions
... On moderate spring day in Delaware, temperature is a bit higher, ca. 20 C (68 F). But given the approxmiations, this is pretty close to the characteristic temperature computed for simple blackbody! b. According to http://en.wikipedia.org/wiki/Earth, Earth’s “albedo”, meaning the fraction of received ...
... On moderate spring day in Delaware, temperature is a bit higher, ca. 20 C (68 F). But given the approxmiations, this is pretty close to the characteristic temperature computed for simple blackbody! b. According to http://en.wikipedia.org/wiki/Earth, Earth’s “albedo”, meaning the fraction of received ...
Unit 5 – Creating and Understanding Spectra
... Since it gives off so little light per square centimeter, this means that Betelgeuse must be huge, with an enormous surface area. It is a RED GIANT star, big enough to swallow up much of the Solar System. (Our Sun will become a red giant at the end of its life, swallowing up Mercury and Venus!) ...
... Since it gives off so little light per square centimeter, this means that Betelgeuse must be huge, with an enormous surface area. It is a RED GIANT star, big enough to swallow up much of the Solar System. (Our Sun will become a red giant at the end of its life, swallowing up Mercury and Venus!) ...
Stars, Galaxies, and the Universe Section 1 Section 1
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
PRE-LAB
... Well, you could specify the position of a star in terms of ALTITUDE and AZIMUTH. However, this is messy because ALTITUDE and AZIMUTH change throughout the night. Also, they depend on your position , (i.e., your HORIZON and your latitude) on the EARTH. Clearly, we need a better method to describe the ...
... Well, you could specify the position of a star in terms of ALTITUDE and AZIMUTH. However, this is messy because ALTITUDE and AZIMUTH change throughout the night. Also, they depend on your position , (i.e., your HORIZON and your latitude) on the EARTH. Clearly, we need a better method to describe the ...
Detection and spectroscopy of exo-planets like Earth J.R.P. Angel
... separation oftwo elements, and by taking advantage ofEarth's rotation. How far can these steps be duplicated by a nulling space interferometer? Rotation of a space interferometer about the line of sight to the star would be straighiforward, provided the elements are connected by a beam. Varying the ...
... separation oftwo elements, and by taking advantage ofEarth's rotation. How far can these steps be duplicated by a nulling space interferometer? Rotation of a space interferometer about the line of sight to the star would be straighiforward, provided the elements are connected by a beam. Varying the ...
The cosmological distance ladder
... can get an estimate the galaxy's distance using Hubble's Law (V = H0 d) with a 10% uncertainty due to the peculiar velocity. At a redshift of 3 percent the speed of light (9000 km/sec), the effect of any perturbations on the galaxy's motion are correspondingly smaller (roughly 3 percent). ...
... can get an estimate the galaxy's distance using Hubble's Law (V = H0 d) with a 10% uncertainty due to the peculiar velocity. At a redshift of 3 percent the speed of light (9000 km/sec), the effect of any perturbations on the galaxy's motion are correspondingly smaller (roughly 3 percent). ...
STAR UNIT FLASH BACKS
... 1. TRUE OR FALSE: If a star is colored red, that means that it is moving AWAY from us (due to Red Shift). 2. How long would it take for an F-22 Raptor jet flying at top speed (1,500 miles per hour) to fly from the earth to the sun? a.) 8 minutes ...
... 1. TRUE OR FALSE: If a star is colored red, that means that it is moving AWAY from us (due to Red Shift). 2. How long would it take for an F-22 Raptor jet flying at top speed (1,500 miles per hour) to fly from the earth to the sun? a.) 8 minutes ...
Document
... The Birth of Stars • We’ve talked about how the solar system probably formed from the solar nebula about 4.6 million years ago. • There is stuff in between the stars– dust and gas– that we call the interstellar medium. • The interstellar medium is about 10% of our galaxies mass. Consists of 90% hyd ...
... The Birth of Stars • We’ve talked about how the solar system probably formed from the solar nebula about 4.6 million years ago. • There is stuff in between the stars– dust and gas– that we call the interstellar medium. • The interstellar medium is about 10% of our galaxies mass. Consists of 90% hyd ...
Issue 118 - Apr 2014
... two, closer to the brighter star or closer to the dimmer star. Estimate the brightness to a tenth of a magnitude. You can use binoculars or naked eye. When you locate the variable field, identify the variable and comparison stars that are closest to the current magnitude of the variable. Be patient ...
... two, closer to the brighter star or closer to the dimmer star. Estimate the brightness to a tenth of a magnitude. You can use binoculars or naked eye. When you locate the variable field, identify the variable and comparison stars that are closest to the current magnitude of the variable. Be patient ...
The Constellation Microscopium, the Microscope Microscopium is a
... Piscis Austrinus and Grus to the west, Sagittarius to the east, Indus to the south, and touching on Telescopium to the southeast. The recommended three-letter abbreviation for the constellation, as adopted Seen in the 1824 star chart set Urania's Mirror (lower left) by the International Astronomical ...
... Piscis Austrinus and Grus to the west, Sagittarius to the east, Indus to the south, and touching on Telescopium to the southeast. The recommended three-letter abbreviation for the constellation, as adopted Seen in the 1824 star chart set Urania's Mirror (lower left) by the International Astronomical ...
Document
... • Blue and UV continuum increase by several magnitudes in seconds (unlike the Sun, where the contrast to the photospheric background is less) • Typically a black body of 8,000 –10,000K • The source of the white light is still unknown • Strong,broad emission lines in the UV and optical – Balmer, Ca I ...
... • Blue and UV continuum increase by several magnitudes in seconds (unlike the Sun, where the contrast to the photospheric background is less) • Typically a black body of 8,000 –10,000K • The source of the white light is still unknown • Strong,broad emission lines in the UV and optical – Balmer, Ca I ...
Part 1
... Sun’s Energy Source • Thermal energy (chemical reactions)? – wood or fuel burning – Entire Sun used in a few thousand years ...
... Sun’s Energy Source • Thermal energy (chemical reactions)? – wood or fuel burning – Entire Sun used in a few thousand years ...
McDonald Observatory Planet Search - tls
... False alarm probability ≈ 1 – (1–e–P)N = probability that noise can create the signal N = number of indepedent frequencies ≈ number of data points ...
... False alarm probability ≈ 1 – (1–e–P)N = probability that noise can create the signal N = number of indepedent frequencies ≈ number of data points ...
Chapter 2
... Sirius looks brighter than Alpha Centauri, but we know that Alpha Centauri is closer because its apparent position in the sky shifts by a larger amount as Earth orbits the Sun. ...
... Sirius looks brighter than Alpha Centauri, but we know that Alpha Centauri is closer because its apparent position in the sky shifts by a larger amount as Earth orbits the Sun. ...
Review Powerpoint #3
... ground. Giraffes with shorter necks now have a hard time getting food, while those with longer necks can feed on the high-growing leaves. After several generations, the giraffes in this area all have longer necks than those before the blight. According to the theory of natural ...
... ground. Giraffes with shorter necks now have a hard time getting food, while those with longer necks can feed on the high-growing leaves. After several generations, the giraffes in this area all have longer necks than those before the blight. According to the theory of natural ...
Stellar Distances - Red Hook Central School District
... Equals approximately 3.26 light years (ly) or about 206,265 astronomical units – AU. AU – distance Earth to Sun. (1.5 x 1011m) ...
... Equals approximately 3.26 light years (ly) or about 206,265 astronomical units – AU. AU – distance Earth to Sun. (1.5 x 1011m) ...
parallax
... Determining distances to celestial objects is one of the most important and most difficult measurements in astronomy. Compare the Sun to another star in the sky. They look completely different, and it was once believed that they were different types of objects. In fact, the Sun was once considered a ...
... Determining distances to celestial objects is one of the most important and most difficult measurements in astronomy. Compare the Sun to another star in the sky. They look completely different, and it was once believed that they were different types of objects. In fact, the Sun was once considered a ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.