L = σAT 4
... • A large number of stars the fall on the line that goes from the top left to bottom right. This line is known as the MAIN SEQUENCE and stars that are on it are known as the main sequence stars. Our sun is a main sequence star. These stars are ‘normal’ stable starsthe only difference between them is ...
... • A large number of stars the fall on the line that goes from the top left to bottom right. This line is known as the MAIN SEQUENCE and stars that are on it are known as the main sequence stars. Our sun is a main sequence star. These stars are ‘normal’ stable starsthe only difference between them is ...
Testing
... Lower-mass stars return gas to interstellar space through stellar winds and planetary nebulae. ...
... Lower-mass stars return gas to interstellar space through stellar winds and planetary nebulae. ...
Globular Cluster in Canes Venatici
... is easy to spot in binoculars; a 4-inch scope will resolve the outer portions but it takes an 8-inch scope to resolve the core. One reference notes that M3 is notable for its extensive halo and radiating arms of stars. ...
... is easy to spot in binoculars; a 4-inch scope will resolve the outer portions but it takes an 8-inch scope to resolve the core. One reference notes that M3 is notable for its extensive halo and radiating arms of stars. ...
ppt
... with ~ same speed • But this creates a winding dilemma • So density waves must sweep around galaxy, which move more slowly around the galaxy than the matter inside • This crowding promotes stellar birth and recycling of ISM ...
... with ~ same speed • But this creates a winding dilemma • So density waves must sweep around galaxy, which move more slowly around the galaxy than the matter inside • This crowding promotes stellar birth and recycling of ISM ...
The Life of a Star
... Once all fusion reactions stop, the star throws its outer layers into space, forming a planetary nebula – This leaves behind the hot dense core of the red giant. – The remaining core is called a white dwarf. Over time, the white dwarf cools off and becomes a black dwarf. Planetary Nebula: A collecti ...
... Once all fusion reactions stop, the star throws its outer layers into space, forming a planetary nebula – This leaves behind the hot dense core of the red giant. – The remaining core is called a white dwarf. Over time, the white dwarf cools off and becomes a black dwarf. Planetary Nebula: A collecti ...
Chapter 8 - TeacherWeb
... Because stars are long distances away astronomers use lightyears to measure the distances from Earth to the stars. Light year is the distance light travels in one year. Parallax: an apparent shift in the position of an object when viewed from different locations. The Earth moves. Astronomers must us ...
... Because stars are long distances away astronomers use lightyears to measure the distances from Earth to the stars. Light year is the distance light travels in one year. Parallax: an apparent shift in the position of an object when viewed from different locations. The Earth moves. Astronomers must us ...
Star Clusters and Stellar Dynamics
... energy amongst themselves. If at some moment a star becomes unbound (kinetic + potential energy > 0) then it will escape the cluster entirely. Evaporation time tevap ~ 100 trelax , and although long, it limits the cluster lifetime. Evaporation is accelerated by tidal shocks, which implant additional ...
... energy amongst themselves. If at some moment a star becomes unbound (kinetic + potential energy > 0) then it will escape the cluster entirely. Evaporation time tevap ~ 100 trelax , and although long, it limits the cluster lifetime. Evaporation is accelerated by tidal shocks, which implant additional ...
What is a Red Shift?
... What did the telescope find after viewing a black sky for 10 days? What was one difference with the telescope the second time they pointed it at a black area in space? Technology is defined as the use of knowledge gained through science to make new products or tools people can use. What role does te ...
... What did the telescope find after viewing a black sky for 10 days? What was one difference with the telescope the second time they pointed it at a black area in space? Technology is defined as the use of knowledge gained through science to make new products or tools people can use. What role does te ...
Uniqueness of the Earth, Lebo, 7-30
... Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locations the star densities are too high – the planetary orbits would be unstable. ...
... Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locations the star densities are too high – the planetary orbits would be unstable. ...
An Introduction to the Night Sky Stars and Constellations
... An Introduction to the Night Sky Stars and Constellations 1. What is the Latin root word of star? 2. Why do stars “twinkle”? 3. Why do planets “shine”? ...
... An Introduction to the Night Sky Stars and Constellations 1. What is the Latin root word of star? 2. Why do stars “twinkle”? 3. Why do planets “shine”? ...
Conceptual Physics
... 3. In a random sample of stars in the Sun’s neighborhood, you would expect about 90% of them: a. To be red giants b. To be white dwarfs c. To be main sequence stars d. To have just been born e. To be older than the Sun 4. A star near the top of the main sequence has a mass about: a. Twice the Sun’s ...
... 3. In a random sample of stars in the Sun’s neighborhood, you would expect about 90% of them: a. To be red giants b. To be white dwarfs c. To be main sequence stars d. To have just been born e. To be older than the Sun 4. A star near the top of the main sequence has a mass about: a. Twice the Sun’s ...
Constellation Notes
... How many constellations are there? The sky was divided up into 88 different constellations in 1922. This included 48 ancient constellations listed by the Greek astronomer Ptolemy as well as 40 new constellations. Star Maps The 88 different constellations divide up the entire night sky as seen from a ...
... How many constellations are there? The sky was divided up into 88 different constellations in 1922. This included 48 ancient constellations listed by the Greek astronomer Ptolemy as well as 40 new constellations. Star Maps The 88 different constellations divide up the entire night sky as seen from a ...
slides
... As the cloud contracts the over density grows. A cloud may have few such over dense regions, which pull surrounding matter and grow in size and density. ...
... As the cloud contracts the over density grows. A cloud may have few such over dense regions, which pull surrounding matter and grow in size and density. ...
dark matter
... Chemical evolution Finished last time by saying that all elements heavier than hydrogen and helium were formed in stars. The younger a star, the more material from previous generations of stars it will contain, and the higher their metallicity. Stars can be broadly split into two populations: Popula ...
... Chemical evolution Finished last time by saying that all elements heavier than hydrogen and helium were formed in stars. The younger a star, the more material from previous generations of stars it will contain, and the higher their metallicity. Stars can be broadly split into two populations: Popula ...
CHP 11
... 5. _______________ occurs when most of the material collapsing to form a protostar has fallen into a disk around the star, and a strong wind from the warm protostar ejects material from its poles. a. An emission nebula b. Hydrostatic equilibrium c. The proton-proton chain d. The thermonuclear fusion ...
... 5. _______________ occurs when most of the material collapsing to form a protostar has fallen into a disk around the star, and a strong wind from the warm protostar ejects material from its poles. a. An emission nebula b. Hydrostatic equilibrium c. The proton-proton chain d. The thermonuclear fusion ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.