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SigAssignment
SigAssignment

... Mizar is in the life cycle stage of being a protostar, and is considerably younger than our sun. It is in the process of condensing its matter and uses hydrogen has its fuel source. Mizar’s core can reach up to 27,000,032 degrees Fahrenheit during this stage of life. Our Sun is usually about 9,940 d ...
Lec7_2D
Lec7_2D

Sample multiple choice questions for Exam 2
Sample multiple choice questions for Exam 2

... 37. The final stellar remnant of a one solar mass star is a a) white dwarf. b) neutron star. c) pulsar. d) black hole. e) main sequence star. 38. Neutron stars are thought to form from a) 1 Msun stars. b) 5 Msun stars. c) 10 Msun stars. d) 50 Msun stars. e) all stars; mass has nothing to do with it. ...
For instance, two hydrogen atoms may fuse together to form one
For instance, two hydrogen atoms may fuse together to form one

... Astronomers classify stars based on their age, color, and brightness. These characteris tics help them identify and understand the different kinds of stars. A star’s surface temperature determines the amount of visible light given off (its brightness) and the color we perceive the star to be. For ex ...
ppt
ppt

... How can we test theories of star evolution? • Binaries help, because one can get mass so that theories can be tested • But stars change so slowly, it is impossible to test theories by watching just one star move through phases • Fortunately, there are 1011 stars in our Galaxy, all with a range of ma ...
Shedding Light on Relativity - DCC
Shedding Light on Relativity - DCC

... black holes instead of neutron stars » Formed from very massive binary stars? » No clear evidence of such systems ...
Dynamite Diameters
Dynamite Diameters

... *Measurements outlined in black are from the CHARA Array. Does not include new results presented here on K-M dwarfs. ...
Tour of the Galaxy - Shelbyville Central Schools
Tour of the Galaxy - Shelbyville Central Schools

Name
Name

... A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) two helium nuclei into one carbon nucleus plus energy and a neutrino E) three helium nuclei into one carbon nucleus plus ene ...
GRAVITY FIELD IN EXTERNAL PARTS OF THE SOLAR SYSTEM
GRAVITY FIELD IN EXTERNAL PARTS OF THE SOLAR SYSTEM

... within the incidence of the Sun. According to (Oort, 1950) exist cloud around the Sun of comet nuclei, called the Oort cloud. This cloud is not available observations. But if it exists, the comet nucleus moving near the outskirts of the solar system. At the outskirts of the solar system must take in ...
Name
Name

... A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) two helium nuclei into one carbon nucleus plus energy and a neutrino E) three helium nuclei into one carbon nucleus plus ene ...
GeoDome Notes
GeoDome Notes

... They are named for the constellation they appear to be radiating from. The best view is around what is called the peak and the best viewing is in the time after midnight and before dawn when there is no moon in the sky. ...
UCSD Students` Presentation on Star Formation
UCSD Students` Presentation on Star Formation

... Stages 4 & 5: Protostellar Evolution *The mass is now the size of Mercury’s orbit, and the temp. is a few thousand kelvins -We can now calculate the luminosity using the radius-luminosity-temperature relationship *H-R diagram shows the physical properties in stage 4 -The surface temp. and luminosit ...
Name - MIT
Name - MIT

... A) corona, core, convection zone, radiation zone, photosphere, chromosphere B) photosphere, chromosphere, core, radiation zone, convection zone, corona C) core, radiation zone, convection zone, photosphere, chromosphere, corona D) core, radiation zone, corona, convection zone, chromosphere, photosph ...
Name - MIT
Name - MIT

... A) corona, core, convection zone, radiation zone, photosphere, chromosphere B) photosphere, chromosphere, core, radiation zone, convection zone, corona C) core, radiation zone, convection zone, photosphere, chromosphere, corona D) core, radiation zone, corona, convection zone, chromosphere, photosph ...
Lecture14
Lecture14

... • Dust and gas is mostly found in galaxy disks, and blocks optical light ...
THE LIFE CYCLE OF STARS
THE LIFE CYCLE OF STARS

Star Types - University of Massachusetts Amherst
Star Types - University of Massachusetts Amherst

Slide 1 - Physics @ IUPUI
Slide 1 - Physics @ IUPUI

... • RR Lyrae – lower mass stars after they undergo their Helium flash (the sun will do this someday). • RR Lyrae are Horizontal Branch stars. • Metal rich and Metal poor Cepheid variables (Type I and II). • These are the higher mass stars which pass back and forth through the instability strip. ...
Stars
Stars

... c. a set of emission lines shared with other elements. d. a set of absorption lines shared with other elements. 10. Why is the spectrum of a star called an absorption spectrum? ...
Handout Life of Stars
Handout Life of Stars

... inward pressure of its gravity (known as hydrostatic equilibrium). This is the period known as the main sequence of the star. Already about 4.5 - 5 billion years old, when the Sun’s hydrogen fuel starts to run out (in an estimated further 5 billion years or so), its main sequence comes to an end, an ...
Death of Massive Stars
Death of Massive Stars

... Black Holes • At the end of the lives of stars greater than 25-30 MSUN, neutrons in the collapsing core eventually cannot provide enough pressure to support the proto-neutron star against its gravity, and it collapses further. What happens next? • Answer: it collapses inwards until all of its matte ...
Where Is Everybody? - Center for Peripheral Studies
Where Is Everybody? - Center for Peripheral Studies

... billions of planets circling them — a few of which have recently been identified by the orbiting telescope that bears Hubble’s name. On many of those billions of planets, conditions are probably favorable to the emergence of carbon-and-water based life forms. In the half-century since Fermi posed hi ...
Stellar Evolution 1 Star Formation 2 Nebulae
Stellar Evolution 1 Star Formation 2 Nebulae

... The lifetimes of stars are typically in the billions of years, although the more massive the star, the shorter the lifetime. The “birth” and “death” of a star take a relatively short time compared to the long middle part of the “life” of a star. In the long middle part, in which the star is relative ...
PPT
PPT

... (protons) into one helium nucleus (2 protons and 2 neutrons). Let’s look at details. ...
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Future of an expanding universe

Observations suggest that the expansion of the universe will continue forever. If so, the universe will cool as it expands, eventually becoming too cold to sustain life. For this reason, this future scenario is popularly called the Big Freeze.If dark energy—represented by the cosmological constant, a constant energy density filling space homogeneously, or scalar fields, such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space—accelerates the expansion of the universe, then the space between clusters of galaxies will grow at an increasing rate. Redshift will stretch ancient, incoming photons (even gamma rays) to undetectably long wavelengths and low energies. Stars are expected to form normally for 1012 to 1014 (1–100 trillion) years, but eventually the supply of gas needed for star formation will be exhausted. And as existing stars run out of fuel and cease to shine, the universe will slowly and inexorably grow darker, one star at a time. According to theories that predict proton decay, the stellar remnants left behind will disappear, leaving behind only black holes, which themselves eventually disappear as they emit Hawking radiation. Ultimately, if the universe reaches a state in which the temperature approaches a uniform value, no further work will be possible, resulting in a final heat death of the universe.
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