Is earth the only planet in our solar system to have had fire burning on its surface?

Yes, earth is the only planet with fire. Fire is a chemical reaction combining oxygen and carbon. No other planets have free oxygen in their atmospheres. Lava from a volcano is not fire. It is melted rock.

If you mean true, oxygen-burning fire, then yes. Earth would be the only planet with fuels and free oxygen to start fire.

Other worlds have volcanoes - Venus, Mars, Io (a moon of Jupiter), even possibly Mercury - but that is heated rock - hot enough to melt, but, not true fire.

Fire Burning in the sense of wood burning? Venus Maybe millions of years ago. But none of the others.

No

What are you trying to figure out? That other planets---what? You mean like a campfire? IDK, I'm asking. Because of atmosphere, sure. Venus is a runaway greenhouse from CO2 saturation and other gases in the atmosphere. Like methane, which could burn. And Venus barely moves in its rotation, 4 degrees per day. So the Sun does its work all the time, in perspective..

NO. Jupiter's Moon Io has lava erupting form volcanoes and Saturn's moon Enceladus has water erupting from cryo- volcanoes. Uranus and Neptune probably have cryo-volcanoes.. Venus probably has volcanoes erupting lava resurfacing Venus, and the surface temperature on Venus i and the air pressure is high enough to melt lead and fry the electronics of the Venera landers in less than 2 hours,. Pluto has has volcanoes. The Moon is still geologically active, particularly in the Aristarchus region. Olympus Mons on mars is a volcano, although it is no longer erupting.

Yes, Earth is the only planet with fire. None of the other planets have enough free oxygen to support fire. Even Earth didn't have much free O2 in the atmosphere until 2.4 billion years ago. On all the other planets, oxygen has combined with hydrogen to form water, with carbon to form methane and carbon dioxide, with iron to form iron oxide (rust), with sulfur to make sulfur dioxide, with silicon to form some types of rocks, etc.

there could still be other ones, i dont think we'll ever really ever know for sure, try asking god that question

No

neil armstrong lit a cigarette on the moon.perhaps?