Astronomy
What explanation does general relativity provide for gravity?
Gravity is the result of curved spacetime
In structure, our Milky Way is most similar to:
M-31, the Andromeda Galaxy
Our galaxy is the __________, which is a __________ galaxy
Milky Way, barred spiral
If a space probe could be sent into a black hole, it could transmit images back to Earth
True
If light from a distant star passes close to a massive body, the light beam will:
bend towards the star due to gravity
How do scientists know that black holes exist?
by observing objects and light around black holes
According to Hubble's Law, the greater a galaxy's redshift, the:
closer it is to us
Another student tells you that the Milky Way Galaxy is made up "mostly of stars." Is this statement accurate?
false
super-massive black holes likely exist in the center of every _______________.
galaxy
What powerful force allows black holes to absorb light?
gravity
Galaxies evolve by
merging to form larger galaxies
Which of the following can actually escape from inside a black hole's event horizon?
none of these answers
If the Sun were replaced by a black hole with the same mass:
only the temperature on Earth would be affected
The gravity of a black hole is so strong because of its small __________ and large ___________
size, mass
In the absence of dark matter, the stars most distant from the galactic center should be moving much __________________ than those stars orbiting closer to the center
slower
A galaxy containing substantial amounts of dark matter will
spin faster
Most of the new star formation in the Galaxy is found in the:
spiral arms
Galaxy distance and Doppler redshift are correlated for galaxies. What do we call that correlation?
the Hubble "law"
LIGO detected gravitational waves that probably originated from:
the merger of two black holes
As a spaceship nears an event horizon, a clock on the spaceship will be observed:
to run slowly
It is now believed the majority of mass for most galaxies lies in their dark halos
true
