What is the mass? I need the answer plz

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

Who was the first scientist to measure speed as distance over time?

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.