The color of a star depends on it's
What can a scientist learn about a star from its spectrum?
What color are the hottest stars?
What are objects formed from the materials in the core of a supernova?
Which of the following is true?
Where are globular clusters found?
Where are open clusters found?
Which of the following statements is NOT true?
Why do scientists study distant galaxies?
Which of the following statements is true?
How are objects organized in the universe?
What do scientists think will happen to the universe?
Which of the following is the hottest?
According to the Big Bang Theory, the universe is about
Scientists think that the Milky Way probably is
What is one way scientists use to calculate the age of the universe?
Elliptical galaxies and the halos of spiral galaxies contain groups of stars called
According to the Big Bang Theory, what filled the universe after the original explosion?
The universe is organized according to
What are the three major types of galaxies identified by Edwin Hubble?
Why do scientists study distant galaxies to learn about early galaxies?
Which of the following magnitudes indicates the brightest star?
What binds a galaxy together?
What classification do astronomers use for galaxies?
What type of galaxy is the Milky Way?
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
In order to calculate a star's _____________ magnitude, it is necessary to know it's _________________ magnitude.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
The sun has a(n) __________________ of +4.8 and a(n) ___________________ of -26.8.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
The sun's _________________ is very great because it is so close to Earth.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
A cool star that has lost it's hydrogen is a(n) ___________________.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
Gas or dust from a nearby star that falls into a(n) _________________ gives off X-Rays, allowing astronomers to detect this object.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
It is difficult to locate ________________ because they do not give off light.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
One of the most powerful energy sources in the universe is a(n) __________________.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
According to the Big Bang Theory, _________________ filled all of space following the original explosion.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
The distance traveled by a photon of light in one year is called a __________________.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
A star's ______________ does not depend on its distance from Earth.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
The study of the origin, structure and future of the universe is called __________________.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
Large stars end their lives in huge explosions called_________________.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
Light travels in year over a distance called a(n) ________________.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
How bright a star is at 32.6 light years from Earth is called _________________.
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black hole(s) red giant cosmic background radiation light year quasar apparent magnitude apparent absolute cosmology globular clusters neutron star supernovas elliptical irregular spiral absolute magnitude parallax
A star may seem to move in place because of ______________.
The brightness of a star as it appears to an observer on Earth.
An apparent shift in an object's position when viewed from different locations.
The band of color produced when white light passes through a prism.
The study of the origin, structure and future of the universe.
The distance that light travels in one year; about 9.5 trillion kilometers.
A distant, starlike source of light.
The brightest star as seen from Earth.
The diagonal pattern on the H-R diagram where most stars appear.
An object so massive and dense that not even light can escape its gravitational pull.
The brightness of a star at a distance of 32.6 light years from Earth.