This graph shows the brightness of a star over the course of a transit. Which of the following do we learn about the planet? "
A) It is large enough to block about 2.5% of the star's light.
B) It has an orbital period of less than 2 hours.
C) It is about 2.5% as massive as the star.
D) It is about 97.5% as bright as its star.
A) It is large enough to block about 2.5% of the star's light.
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__________ galaxies contain large clouds of gas and dust, both young and old stars, but have no obvious spiral arms or nucleus
a. Irregular b. S0 c. E7 d. Sa e. E0
When a star collapses to form a black hole, its mass
A) increases. B) decreases. C) remains the same.
According to Newton's laws, the planets orbit the Sun due to ________
Fill in the blank(s) with correct word
The type of detector that uses a magnetic field to curve charged particles is a
A) Geiger tube. B) scintillation counter. C) cloud chamber. D) bubble chamber. E) spark chamber.