Semester review

At what stage does a star appear on the H-R diagram?

A man named Ptolemy constructed the best Geocentric model

What causes atmospheric blurring?

What did Copernicus rediscover?

Where does heating come from in a star when it is still forming?

What does a low-mass star become?

The reason why objects don't hit the ground at the same time is because of air resistance

What is Kepler's 1st law?

When do Brown Dwarfs form?

(HR diagrams) Apparent brightness is how brighta star appears when viewed from earth?

Aristarchus of Samos proposed that all planets revolved around the sun, and that earth rotated on it's axis each day

What is Kepler's 3rd law?

The Geocentric theory was the theory that sun was in the middle of the universe

Whats is Hydrostatic Equilibrium

Who calculated the size of the Earth?

How did the Mayans record their findings?

Images can be formed through reflection or refraction

How many laws does Kepler have?

A planet moves faster when passing through the Perihelion

Eratosthenes concluded that the Earth was a sphere

Star formation occurs when a dust cloud contracts under its own gravitational force

What is Earth's downward acceleration due to Earth's gravity

How many circles did Ptolemaic's model require to describe the paths of the planets?

2 stars that appear equally as bright might be a closer, dimmer star and a farther, brighter one

Kepler's 2nd law is an imaginary line connecting Sun and a planet sweeps out equal areas in equal times.

Copernicus launched the Copernican Revolution. (the thought that the Earth is not the center of the universe)

A high-mass star can continue to fuse elements in its core right up to iron?

What are the 7 categories of stellar spectra?

When a planet passes by the Aphelion then it moves faster

Mayans developed their calendar and built temples aligned to the Sun, equinoxes, and the midsummer/midwinter dates

(Ancient Astronomy) Aristotle studied many subjects from the physical sciences to life sciences

(Ancient Cultures Astronomy) What are some ways people used the stars?

(HR diagrams) What is luminosity?

A protostar's luminosity decreases even as the temperature rises because of compaction

(Birth of a Star) What triggers a star formation?

Light-gathering power improves detail

Low resolution makes objects in space look like a blob

Stellar spectra are more informative that the blackbody curves

Copernicus 's work went against the religious doctrine of the Roman Catholic Church

(Physics Principles) What does the force of gravity between 2 objects depend on?