Astronomy 1

The two moons of Mars are called ...

• Tritos and Desmos

• Tritos and Deimos

• Phobos and Tritos

• Phobos and Deimos

On which planet in our solar system can you find the Great Red Spot?

• Venus

• Mars

• Jupiter

• Saturn

The axis of the Earth is tilted at an angle of approximately ... relative to the orbital plane around the Sun.

• 20.3 degrees

• 21.4 degrees

• 22.7 degrees

• 23.5 degrees

The International Space Station (ISS) circles the Earth approximately 410 km above the ground. Find the best estimate for the orbital speed of the ISS:

• 19,000 km/h

• 21,000 km/h

• 28,000 km/h

• 32,000 km/h

The four big moons of Jupiter are Callisto, Europa, Ganymede, and Io. Which one of them has the smallest distance to Jupiter?

• Callisto

• Europa

• Ganymede

• Io

What does the astronomical term ecliptic describe?

• The path of the Sun in the sky throughout a year.

• The axial tilt of the Earth throughout a year.

• The movement of the stars due to Earth’s rotation.

• The central line through the axis of rotation.

Approximately how long does it take Pluto to orbit the Sun once?

• 150 years

• 200 years

• 250 years

• 300 years

Sunspots are black regions that temporarily appear on the Sun. Their number highly increases every ... years. This period is also called the solar cycle.

• 9

• 11

• 13

• 15

One astronomical unit (AU) is equal to approximately ...

• 130 million km

• 150 million km

• 170 million km

• 190 million km

A comet’s tail points in the following direction:

• away from the Sun

• towards the Sun

• in the direction of movement

• against the direction of movement