The Milky Way - Midlandstech
... Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer three ...
... Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer three ...
Phobos
... astronomical units) and their orbit last for an estimated 10,000 years or more. They both have a dK6 spectrum and they follow an orbit that eclipses one another. Their orbital period is 19.5 hours and they are separated by 1.67 million miles, which they cover at 70 miles per second. They have almost ...
... astronomical units) and their orbit last for an estimated 10,000 years or more. They both have a dK6 spectrum and they follow an orbit that eclipses one another. Their orbital period is 19.5 hours and they are separated by 1.67 million miles, which they cover at 70 miles per second. They have almost ...
The most important questions to study for the exam
... 22. What condition is necessary in order for a binary star system to appear as an eclipsing binary? • The line of sight from the Earth to the binary star must be close to the perpendicular to the star system's orbital plane. • The line of sight from the Earth to the binary star must be in or almost ...
... 22. What condition is necessary in order for a binary star system to appear as an eclipsing binary? • The line of sight from the Earth to the binary star must be close to the perpendicular to the star system's orbital plane. • The line of sight from the Earth to the binary star must be in or almost ...
Stars
... When we look up into the night sky, it is easy to imagine, as did the ancient Greeks, that all the stars are the same distance, stuck to some sort of Celestial Sphere that rotates through the heavens as the Earth stands still. This conclusion would be very wrong, however. It has taken astronomers th ...
... When we look up into the night sky, it is easy to imagine, as did the ancient Greeks, that all the stars are the same distance, stuck to some sort of Celestial Sphere that rotates through the heavens as the Earth stands still. This conclusion would be very wrong, however. It has taken astronomers th ...
Post-class version
... at the center of the solar system. This question does not state that the Sun will become a black hole. It is only asking what would happen if, somehow, a black hole were substituted for the Sun. ...
... at the center of the solar system. This question does not state that the Sun will become a black hole. It is only asking what would happen if, somehow, a black hole were substituted for the Sun. ...
HIERARCHICAL GALAXY ASSEMBLY AND ITS MANIFESTATIONS
... gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
... gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
Core Theme 2: Constellations
... the first evidence of atmospheric water vapor beyond the solar system, while extrasolar planets orbiting the star HR 8799 also in Pegasus are the first to be directly imaged. ...
... the first evidence of atmospheric water vapor beyond the solar system, while extrasolar planets orbiting the star HR 8799 also in Pegasus are the first to be directly imaged. ...
TY Course Day 2 Friday Constellations v1
... evidence of atmospheric water vapor beyond the solar system, while extrasolar planets orbiting the star HR 8799 also in Pegasus are the first to be directly imaged. ...
... evidence of atmospheric water vapor beyond the solar system, while extrasolar planets orbiting the star HR 8799 also in Pegasus are the first to be directly imaged. ...
The supernova of AD1181 – an update
... (1982) from neutral hydrogen (21 cm) line observations – has been confirmed by more recent 21 cm observations by Roberts et al. (1993). These authors also confirmed that confusion with structure in hydrogen emission was responsible for apparent absorption features that had led to the erroneous large ...
... (1982) from neutral hydrogen (21 cm) line observations – has been confirmed by more recent 21 cm observations by Roberts et al. (1993). These authors also confirmed that confusion with structure in hydrogen emission was responsible for apparent absorption features that had led to the erroneous large ...
mass_spetral
... This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
... This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
Three types of binary stars.
... guaranteed that we are in the orbital plane. This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
... guaranteed that we are in the orbital plane. This means that the maximum radial velocity on the velocity plot gives us the orbital velocity. Now we have “a” and we have “P”. We can get rid of one of the “M”s because we know how they are related. ...
Unit 4: Astronomy
... 2) Describe the unit of the length developed by astronomers to measure and describe distances to stars other than our own sun. 3) Explain the statement “looking deep into space is essentially looking back in time”. 4) Describe why some of the stars in the sky at night are only visible at certain tim ...
... 2) Describe the unit of the length developed by astronomers to measure and describe distances to stars other than our own sun. 3) Explain the statement “looking deep into space is essentially looking back in time”. 4) Describe why some of the stars in the sky at night are only visible at certain tim ...
E:\2012-2013\SSU\PHS 207spring 2013\3rd test 4
... 1. Why are Cepheid variable stars important in our study of the Milky Way galaxy? By monitoring a Cepheid star its distance from us can be calculated. Since we assume that nearly all the stars in a cluster are nearly the same age, we can determine the cluster’s age and distance ad some range of the ...
... 1. Why are Cepheid variable stars important in our study of the Milky Way galaxy? By monitoring a Cepheid star its distance from us can be calculated. Since we assume that nearly all the stars in a cluster are nearly the same age, we can determine the cluster’s age and distance ad some range of the ...
RED “O Big Red
... small,” he explained, shining the light at the floor. then he turned on the cabin light, which lit up the whole deck. “the cabin light isn’t as bright, but it’s much larger, so it puts out more total light.” ...
... small,” he explained, shining the light at the floor. then he turned on the cabin light, which lit up the whole deck. “the cabin light isn’t as bright, but it’s much larger, so it puts out more total light.” ...
Hertzsprung-Russell Diagram
... A star has a high luminosity (100 solar luminosities) and a surface temperature of 3500 K. What type of star is it? ...
... A star has a high luminosity (100 solar luminosities) and a surface temperature of 3500 K. What type of star is it? ...
Description of Pictures In the Dome
... been extensively studied by professional astronomers. The galaxy is also the fifth brightest in the sky, making it an ideal amateur astronomy target, although the galaxy is only visible from low northern latitudes and the southern hemisphere. A relativistic jet which extracts energy from the vicinit ...
... been extensively studied by professional astronomers. The galaxy is also the fifth brightest in the sky, making it an ideal amateur astronomy target, although the galaxy is only visible from low northern latitudes and the southern hemisphere. A relativistic jet which extracts energy from the vicinit ...
ASTR 200 : Lecture 15 Ensemble Properties of Stars
... • So, a large cloud (1000s to ~million solar masses) gets cold enough that many cores collapse into stars, giving a cluster • Each star clears gas disk away, but the cluster as a whole also blows out all the remaining interstellar gas, shutting down star formation • The stars settle onto the main se ...
... • So, a large cloud (1000s to ~million solar masses) gets cold enough that many cores collapse into stars, giving a cluster • Each star clears gas disk away, but the cluster as a whole also blows out all the remaining interstellar gas, shutting down star formation • The stars settle onto the main se ...
Stars & Constellations
... However some constellations can be seen all year round. Some, like Cassiopeia are circumpolar - this means they circle above the pole, so can always been seen (the Earth’s orbit around the sun does not affect their viewing) ...
... However some constellations can be seen all year round. Some, like Cassiopeia are circumpolar - this means they circle above the pole, so can always been seen (the Earth’s orbit around the sun does not affect their viewing) ...
The Solar System
... core detonates star – Supernova! • Shines as bright as a galaxy for a few days! We are Stardust from Supernovae! GENS4001 Astronomy ...
... core detonates star – Supernova! • Shines as bright as a galaxy for a few days! We are Stardust from Supernovae! GENS4001 Astronomy ...
Microsoft Power Point version
... which means we can calculate its luminosity by measuring its pulsation period. Once we know a Cepheid’s luminosity, we can calculate its distance from the luminosity–distance formula. This property of Cepheids enables us to measure distances to many other galaxies in which these variable stars have ...
... which means we can calculate its luminosity by measuring its pulsation period. Once we know a Cepheid’s luminosity, we can calculate its distance from the luminosity–distance formula. This property of Cepheids enables us to measure distances to many other galaxies in which these variable stars have ...
16. Properties of Stars
... which means we can calculate its luminosity by measuring its pulsation period. Once we know a Cepheid’s luminosity, we can calculate its distance from the luminosity–distance formula. This property of Cepheids enables us to measure distances to many other galaxies in which these variable stars have ...
... which means we can calculate its luminosity by measuring its pulsation period. Once we know a Cepheid’s luminosity, we can calculate its distance from the luminosity–distance formula. This property of Cepheids enables us to measure distances to many other galaxies in which these variable stars have ...
Why is there a main sequence?
... Mmax ~ 100 solar masses a) More massive clouds fragment into smaller pieces during star formation ...
... Mmax ~ 100 solar masses a) More massive clouds fragment into smaller pieces during star formation ...
HR Diagram
... 10. Apparent Brightness: Explain why the Sun, an average size star with a medium temperature, appears so much brighter than all other stars in the sky. __________________________________________________________________________________________ _________________________________________________________ ...
... 10. Apparent Brightness: Explain why the Sun, an average size star with a medium temperature, appears so much brighter than all other stars in the sky. __________________________________________________________________________________________ _________________________________________________________ ...
Due: January 14, 2014 Name: White dwarfs are “has been
... (their masses are too small to initiate nuclear fusion). White dwarfs are more massive, smaller in radius, and much denser than brown dwarfs. ...
... (their masses are too small to initiate nuclear fusion). White dwarfs are more massive, smaller in radius, and much denser than brown dwarfs. ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.