Constellations

What is the primary factor that determines a star's surface temperature?

• A. Its age

• B. Its mass

• C. Its brightness

• D. Its location in the galaxy

Why does the Sun appear brighter than other stars in the sky?

• A. It is the largest star in the universe

• B. It has the highest surface temperature

• C. It is the closest star to Earth

• D. It produces more energy than all other stars

Which of the following stars has the highest surface temperature?

• A. Proxima Centauri

• B. Vega

• C. Alnilam

• D. Epsilon Eridani

What is the relationship between a star's color and its temperature?

• A. Red stars are hotter than blue stars.

• B. Yellow stars are the hottest.

• C. Blue stars are hotter than red stars.

• D. Color does not indicate temperature.

How does a star's absolute brightness differ from its apparent brightness?

• A. Absolute brightness depends on its distance from Earth, while apparent brightness does not.

• B. Apparent brightness is how bright the star appears from Earth, while absolute brightness is its actual luminosity.

• C. Absolute brightness is affected by interstellar dust, while apparent brightness is not.

• D. Both are the same measurement.

Why does the Sun's light take about 8 minutes to reach Earth?

• A. The Sun is moving at the speed of light

• B. Light slows down in space

• C. Light from the Sun travels through the vacuum of space at a constant speed

• D. The Earth's atmosphere delays the sunlight

What is a constellation?

• A) A group of stars that move together in space

• B) A pattern of stars as seen from Earth

• C) A collection of stars that share the same temperature

• D) A cluster of stars inside a single galaxy

Why do constellations appear to stay the same shape over centuries?

• A. Stars in a constellation are physically connected.

• B. The universe is static.

• C. Stars are so far away that their movement is not noticeable in a human lifetime.

• D. Earth's rotation keeps their positions fixed.

What is the difference between an open cluster and a globular cluster?

• A. Open clusters contain younger stars, while globular clusters have older stars.

• B. Open clusters are found only in the Milky Way, while globular clusters exist in other galaxies.

• C. Globular clusters contain planets, while open clusters do not.

• D. Open clusters have more stars than globular clusters.

Why do constellations appear to move across the night sky?

• A. The stars are actually moving very fast.

• B. Earth rotates on its axis.

• C. Earth's gravity pulls stars around the sky.

• D. The Moon's gravity affects star movement.