are you religious? if so, then god. if not, then you would think meteors.
by a rock
Mercury
Mercury is the closest planet to the sun.
Mercury is a planet.
No. The asteroid belt blocks the planet from being as well as the size and distace of the planet
Mercury is not a dwarf planet. It is a planet.
The planet that shrank in diameter is Mercury. Its diameter decreased as its core cooled and contracted, causing its surface to wrinkle and form scarps.
Mercury is itself a planet - it did not come from a planet!
how does the planet mercury's spins?
Mercury
Mercury is the planet: there is no raw (or ripe) planet associated with it!
Mercury is a very hot planet. Mercury is the closest planet to the sun.