DTU_9e_ch12
... Alnitak, the easternmost star in the belt of Orion. To the left of Alnitak is a bright, red emission nebula called NGC 2024. The glowing gases in emission nebulae are excited by UV radiation from young, massive stars. Dust grains obscure part of NGC 2024, giving the appearance of black streaks, whil ...
... Alnitak, the easternmost star in the belt of Orion. To the left of Alnitak is a bright, red emission nebula called NGC 2024. The glowing gases in emission nebulae are excited by UV radiation from young, massive stars. Dust grains obscure part of NGC 2024, giving the appearance of black streaks, whil ...
OBJXlab-JCU_Alt
... many fields of science, discovery implies finding something that is hidden out of sight, such as digging up a fossil hidden under layers of clay, discovering the chemical structure of an enzyme, or traveling to the heart of the rainforest to photograph a previously unknown species of songbird. But h ...
... many fields of science, discovery implies finding something that is hidden out of sight, such as digging up a fossil hidden under layers of clay, discovering the chemical structure of an enzyme, or traveling to the heart of the rainforest to photograph a previously unknown species of songbird. But h ...
Fulltext PDF
... star clusters are widely used as ideal samples to study stellar evolution as all other parameters are fixed, and the mass of stars defines it’s evolution. In the present times, they are also very useful in understanding star and planet formation as these are very closely linked processes, planet for ...
... star clusters are widely used as ideal samples to study stellar evolution as all other parameters are fixed, and the mass of stars defines it’s evolution. In the present times, they are also very useful in understanding star and planet formation as these are very closely linked processes, planet for ...
CAPSTONE-poster
... The famous astronomer William Herschel discovered the first planetary nebulae called Dumbbell nebula (M27) in the 1870’s. The name was given because he found an apparent similarity to the disk of Uranus. So far, there are 2,000 planetary nebulae in our Milky Way galaxy and their average lifespan is ...
... The famous astronomer William Herschel discovered the first planetary nebulae called Dumbbell nebula (M27) in the 1870’s. The name was given because he found an apparent similarity to the disk of Uranus. So far, there are 2,000 planetary nebulae in our Milky Way galaxy and their average lifespan is ...
Unit 1
... • Light from galaxies always appears fuzzy and diffuse, due to the vast separation between the Sun and the observed galaxy, as well as the separation between the stars of that galaxy! – The paleness of visible light from distant galaxies is called the surface brightness. ...
... • Light from galaxies always appears fuzzy and diffuse, due to the vast separation between the Sun and the observed galaxy, as well as the separation between the stars of that galaxy! – The paleness of visible light from distant galaxies is called the surface brightness. ...
PH607 – Galaxies 2
... formation event a few million years ago. The existence of these relatively young (though evolved) stars there was of a surprise to experts, who would have expected the tidal forces from the central black-hole to prevent their formation. They are much too young to have migrated far, but it seems even ...
... formation event a few million years ago. The existence of these relatively young (though evolved) stars there was of a surprise to experts, who would have expected the tidal forces from the central black-hole to prevent their formation. They are much too young to have migrated far, but it seems even ...
Interstellar medium, birth and life of stars
... shortest time to become main-sequence stars (O and B stars). In the final stages of pre–main-sequence contraction, when hydrogen fusion is about to begin in the core, the pre–main-sequence star may undergo vigorous chromospheric activity that ejects large amounts of matter into space. G, K, and M ...
... shortest time to become main-sequence stars (O and B stars). In the final stages of pre–main-sequence contraction, when hydrogen fusion is about to begin in the core, the pre–main-sequence star may undergo vigorous chromospheric activity that ejects large amounts of matter into space. G, K, and M ...
Pulsating variable stars and the Hertzsprung
... stars in different stages of their evolution. It is a plot showing a relationship between luminosity (or absolute magnitude) and stars' surface temperature (or spectral type). The bottom scale is ranging from high-temperature blue-white stars (left side of the diagram) to low-temperature red stars ( ...
... stars in different stages of their evolution. It is a plot showing a relationship between luminosity (or absolute magnitude) and stars' surface temperature (or spectral type). The bottom scale is ranging from high-temperature blue-white stars (left side of the diagram) to low-temperature red stars ( ...
The Milky Way - Montgomery College
... Star forming regions get elongated due to differential rotation. ...
... Star forming regions get elongated due to differential rotation. ...
November News Letter - Boise Astronomical Society
... Mars is located low in the southwest during the early evening this month. It lies 0.6° north of the third-magnitude star Lambda Sagittarii (Kaus Borealis) on November 3 rd Also Mars will be westsouthwest of the bright globular cluster M22 and 5° east of M8, the Lagoon Nebula. It lies 7° south of the ...
... Mars is located low in the southwest during the early evening this month. It lies 0.6° north of the third-magnitude star Lambda Sagittarii (Kaus Borealis) on November 3 rd Also Mars will be westsouthwest of the bright globular cluster M22 and 5° east of M8, the Lagoon Nebula. It lies 7° south of the ...
Polaris
... yellow Cepheid variable (α UMi A), orbited by a bright yellow dwarf (α UMi B) at a distance of about 2400 AU (360 billion kilometers, or 224 billion miles). Polaris B can be seen with even a modest telescope and was first noticed by William Herschel in 1780. In 1929, it was discovered by examining t ...
... yellow Cepheid variable (α UMi A), orbited by a bright yellow dwarf (α UMi B) at a distance of about 2400 AU (360 billion kilometers, or 224 billion miles). Polaris B can be seen with even a modest telescope and was first noticed by William Herschel in 1780. In 1929, it was discovered by examining t ...
PARALLAX EXERCISE1 The goal of this exercise is to introduce the
... difference is that even the nearest stars are quite far away compared to the diameter of the Earth’s orbit around the Sun. Because the stars are so far away, the parallax angle of even the nearest star is extremely small. The nearest star, Proxima Centauri, has a parallax angle of only 0.75" (arcsec ...
... difference is that even the nearest stars are quite far away compared to the diameter of the Earth’s orbit around the Sun. Because the stars are so far away, the parallax angle of even the nearest star is extremely small. The nearest star, Proxima Centauri, has a parallax angle of only 0.75" (arcsec ...
parallax
... difference is that even the nearest stars are quite far away compared to the diameter of the Earth’s orbit around the Sun. Because the stars are so far away, the parallax angle of even the nearest star is extremely small. The nearest star, Proxima Centauri, has a parallax angle of only 0.75" (arcsec ...
... difference is that even the nearest stars are quite far away compared to the diameter of the Earth’s orbit around the Sun. Because the stars are so far away, the parallax angle of even the nearest star is extremely small. The nearest star, Proxima Centauri, has a parallax angle of only 0.75" (arcsec ...
Stellarium Astronomy Software
... 1. Place your planetarium in the corner of a room on a table or bookshelf. This allows the projection to cover walls and ceiling. A room with smooth light-colored walls and ceiling works best. A room that is approximately 12 x 12 feet provides the best projection quality. Star Theater 3.0 works best ...
... 1. Place your planetarium in the corner of a room on a table or bookshelf. This allows the projection to cover walls and ceiling. A room with smooth light-colored walls and ceiling works best. A room that is approximately 12 x 12 feet provides the best projection quality. Star Theater 3.0 works best ...
Constellations Overview
... The most famous of all the constellations are the 12 that make up the Zodiac. All planets can be observed only in these 12 constellations as they pass across the sky during the course of their year. This is because the orbits of all the planets lie within ± 8º of the ecliptic. The Sun also moves t ...
... The most famous of all the constellations are the 12 that make up the Zodiac. All planets can be observed only in these 12 constellations as they pass across the sky during the course of their year. This is because the orbits of all the planets lie within ± 8º of the ecliptic. The Sun also moves t ...
Big Bang Theory
... Introduction: Based at the Mount Wilson Observatory near Los Angeles, Edwin Hubble was the first to observe Cepheid variable stars in many “spiral nebulae.” Using the period-luminosity relationship discovered by Henrietta Swan Leavitt, Hubble estimated the distances to these “nebulae” and determined ...
... Introduction: Based at the Mount Wilson Observatory near Los Angeles, Edwin Hubble was the first to observe Cepheid variable stars in many “spiral nebulae.” Using the period-luminosity relationship discovered by Henrietta Swan Leavitt, Hubble estimated the distances to these “nebulae” and determined ...
Stories in the Stars
... Cluster. A group of objects close to each other; clusters of stars or galaxies. Star clusters are open or globular. Constellation. A pattern of stars that suggests the shape of some god, person, animal or object. Eclipse. Blocking of light from one body by another that passes in front of it. Eclipsi ...
... Cluster. A group of objects close to each other; clusters of stars or galaxies. Star clusters are open or globular. Constellation. A pattern of stars that suggests the shape of some god, person, animal or object. Eclipse. Blocking of light from one body by another that passes in front of it. Eclipsi ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.