mercury and venus
If it enters a planet's atmosphere it can heat up and start to burn and turn into a fireball.
Liquid mercury
mercury
No, we have never seen any evidence of aliens on Mercury.
A fireball occurs when a meteoroid enters Earth's atmosphere and burns up due to friction with the air. Mercury has a very thin atmosphere, so there are not enough particles to create the friction needed for a fireball to form.
The Daily Orbit - 2012 Blazing Fireball Seen Along the East Coast This Weekend - 1.144 was released on: USA: 25 March 2013
Mercury can be seen with or without a telescope, depending on the conditions.
The last fireballs were seen in Austin, Texas on February 15th 2009. They were purported to be debris from a satellite breaking up in space.
Fireball Tim Lawrence goes by Fireball.
Propylene glycol in fireball
The duration of The Fireball is 1.4 hours.
a fireball
no
I believe that is not known. Mercury can be seen with the naked eye, and without an extraordinary effort; in fact, it is fairly bright. Thus, it is likely that it was observed thousands of years ago, perhaps even before written history.
There was a large fireball which rose into the sky.
The Fireball was created on 1950-11-09.