Which one is the right answer?

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

Asher cycles 12 miles in 16 hours. what is his speed?

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.