You Say -nomy, I Say -logy

Answers I encountered correcting exam papers.

What is the main cause of erosion on Moon?
Earth's tidal force.

Why is Mars red?
It is closer to the sun.

#1 What causes a star to twinkle?
Objects in space such as asteroids passing in front of stars.

Why does Triton have a less dense atmosphere than Titan?
Because Triton was to not to have an atmosphere.

Which nature of light does diffraction demonstrate?
The practical nature.

What causes a meteor shower?
Earth orbiting through the asteroid belt.

Why are Mars' seasons more extreme than Earth's?
Mars has no living organisms.

#2 What causes a star to twinkle?

The vibration of the earth.

#1 How long does it take for the Earth to orbit the Sun?
1 month

What are two phenomena that occur more frequently during an active Sun?

Full moons, stars dying off.

#1 Why does Mars appear fainter than Venus?

Venus is brighter than Mars.

What is 'hot Jupiter'?

A large star close to Jupiter.

#3 What causes a star to twinkle?

Binary stars: when one star passes in front of another.

Why do astronomers think Mercury has a large iron core?

Because its moons have iron.

#2 How long does it take for the Earth to orbit the Sun?

364 days.

#1 What is the main cause of erosion on Mars?

Time.

How far across the sky does a star move in two hours?

Half-way across the galaxy.

#4 What causes a star to twinkle?

Interference of celestial winds.

The Sun's size is not changing. What does this say about the Sun?

That the sun is not affected by the atmosphere.

#2 Why does Mars appear fainter than Venus?

Venus is on fire.

#3 How long does it take for the Earth to orbit the Sun?

Months, not years.

#5 What causes a star to twinkle?

Its emission spectrum.

Mention one method that astronomers use to find objects in the celestial sphere.

Looking up at the stars... not sure where you're going with this.

#2 What is the main cause of erosion on Mars?

Erosion.

#4 How long does it take for the Earth to orbit the Sun?

24 hours.

#5 How long does it take for the Earth to orbit the Sun?

23 hours, 56 minutes.

#6 What causes a star to twinkle?

The hydrogen being converted to helium.

When the dog bites, when the bee stings, when I'm feeling sad, I simply remember these two answers, and then I don't feel so bad:

(1)


(2)
The diameter of the Sun is approximately how many times larger than the diameter of Earth?

3 x 10⁸ m/s