ay101

What is strange about discovering an exoplanet with a mass of 2 times Jupiter that orbits much closer to its star than Earth does around the Sun?

• Rock and metal and ice

Which statement is true about finding planets outside of our Solar System?

We have found lots of planets outside our Solar System, mostly by seeing their indirect effects when we observe their parent star.

What is the energy source that keeps the Sun hot?

The combining of light elements into heavier elements, which turns rest mass energy into thermal energy.

We no longer call Pluto a planet because…

C. we learned about the Kuiper Belt and realized that Pluto is actually a Kuiper Belt Object.

Near the Sun, planetary cores were just made of rock and metal, but far from the Sun planet cores were made of _________

Rock and metal and ice

Which of these determines how hot the insides of a terrestrial planet is?

Total size

When an object emitting light of a certain wavelength is moving towards us…

The light that we observe is shorter wavelength than the light that was emitted, and stays the same as time goes on.

Which of these is true about all the giant (jovian and neptunian) planets, but is not true about any terrestrial planets?

They have particles of ice and rock in orbit around them that make rings.

What is the Hubble Space Telescope able to do that allows it to see fine details?

Because it is above the turbulent atmosphere.

In what way is the 10.4m Gran Telescopio Canarias, which is on a mountain in the Canary Islands, better than the 6.5m James Webb Space Telescope, which is in space?

It can collect more light.

If you observe this spectrum from an astronomical object, what type of spectrum is it?

Absorption line

What is the spectrum made of in the following case?

Cooler diffuse gas in front of hot dense gas or solid.

If you observe this spectrum from an astronomical object, what can you conclude about the star?

It contains Hydrogen.