If a specially designed space probe reaches the event horizon of a black hole, an observer watching the clock on this probe from a safe distance would see
A) the clock slow down.
B) the clock speed up.
C) the clock keep time in sync with the observer's clock.
D) the time on the clock would appear to change randomly.
Question 2
The Andromeda Galaxy is faintly visible to the naked eye in the constellation Andromeda. Suppose instead it were located in the same direction in space as the center of the Milky Way Galaxy (but still at its current distance).
How would it appear to the eye in that case? A) We could not see it at all.
B) It would look about the same, but would be in the constellation Sagittarius instead of Andromeda.
C) It would be much brighter, because it would be illuminated by the many stars in the center of our galaxy.
D) It would look about the same, but it would be harder to pick out because its cloud-like appearance would make it blend in with the cloud-like appearance of the Milky Way in our sky.
The life cycle of a zygomycete, the black bread mould Rhizopus stolonifer.
Comet Tempel 1 67 seconds after colliding with the Deep Impact probe.
Arsia mons hole
The effective temperature, or black body temperature, of the Sun (5777 K) is the temperature a black