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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?
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
Which object in our universe has the highest apparent magnitude?
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
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?
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
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?
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
Distances between objects in space can be enormous. Which of the following distances is the longest?
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
There are billions of stars in the known universe. None of them seem to be as bright as the Sun. Which statement gives the best reason why the Sun appears to be the brightest star.
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
Which of the following pairs of terms directly relates to the actual brightness of a star?
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
Scientists use the light-year to describe the relationships between objects in space. What does a light-year measure?
3 years
1 million ly
Sun
distances between stars, galaxies, and other structures in space
Apparent magnitude is a measure of a star’s brightness as seen from Earth and absolute brightness is a measure of the brightn
The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
the distance that light can travel in one year
absolute magnitude and luminosity
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