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Distances between objects in space can be enormous. Which of the following distances is the longest?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
Scientists use the light-year to describe the relationships between objects in space. What does a light-year measure?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
Which object in our universe has the highest apparent magnitude?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
Two stars have the same apparent magnitude as seen from Earth’s surface. Star A is 33 ly away. Star B is 346 ly away. Which of the following statements is true?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
What characteristic of stars is measured by luminosity?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
Astronomers have two ways of measuring the brightness of a star, apparent magnitude and absolute brightness, Which statement best explains the difference between apparent magnitude and absolute brightness?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
A light-year (ly) is the distance that light travels in one year. If a star is 3 ly from Earth, how long does it take light from that star to reach Earth?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
Scientists use different units for different types of measurements. A light year is the unit that astronomers use to measure the distance between which objects?
the distance that light can travel in one year
Star B is more luminous than star A.
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
Sun
3 years
brightness
1 million ly
distances between stars, galaxies, and other structures in space
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