Scientists say Mercury formed through a flurry of violent collisions between rocks and asteroids orbiting the Sun around 4.5 billion years ago.
The discovery add to the continuing mystery of atmospheric phenomena on the gas giants of our solar system.
Debris thrown into the atmosphere by the space rock, rather than chemicals, was most likely responsible for killing off many species.
The spacercraft is targeted to arrive at Saturn's moon Titan in 2034.
Scientists say the effects of extreme space weather on life on Earth may be larger than previously thought.
A new study gives fresh insight into what happens to planets after the death of their star.
The two planets, named TOI-791 b and TOI-791 c, orbit a dwarf star located around 1,110 light years from Earth in the southern constellation Volans.
NASA's Lucy spacecraft collected the first close-up images and other data as it passed 650 miles away from the asteroid.
NASA's James Webb Space Telescope captured HD 80606, four times the mass of Jupiter, sweeping close by its Sun-like star.
The conjunction was visible shortly after sunset, with the two objects shining low in the western sky.
