A new object, Object Y, was discovered outside our solar system. Object Y is small and rocky, is not a satellite of any other ob
ject, and it does not have enough gravity to clear away smaller objects near its orbit. The characteristics of Object Y most closely resemble those of other (2 points) comets.
Comet is an icy, small, and rocky bodies found in space, which discharge gas or dust. They are also called dirty snowballs. It is not considered as the satellite of other objects. It does not exhibit adequate gravity to clear away smaller objects close to its orbit. When it passes close to the Sun, it sheds extra of its ice, and its surface may get surrounded with darkish dirt and would seem more like an asteroid.
It's commonly believed that the dodo went extinct because Dutch sailors ate the beast to extinction after finding that the bird was incredibly easy to catch due to the fact it had no fear of humans.