"I knew we were looking at something very rare," said one of the authors of a new study.
Scientists think that metallic asteroids began their lives as blobs of molten iron, floating in space.
One day our star will run out of fuel and start expanding, engulfing Mercury, Venus and Earth in the process.
Scientists have previously predicted the existence of a large planet lurking in the farthest reaches of the Solar System. However, no observational evidence for this world has been found to date.
The spacecraft will hopefully return to Earth in 2023 with space rock samples from the surface of the asteroid.
Parker has surpassed the previous close approach record set in April 1976 by the German-American spacecraft Helios 2.
The Voyager mission has revolutionized our understanding of the outer Solar System.
The comet was discovered hurtling through the solar system in 2017, but its origins have remained a mystery.
A new study suggests that the Red Planet could have supported subsurface microbes.
In 2006, the International Astronomical Union voted to downgrade Pluto to the status of dwarf planet, sparking a highly controversial debate that has yet to truly subside.
Operators have not heard from the vehicle since June 10, when a giant dust storm blotted out the sun and prevented the rover from recharging its solar-powered batteries.
"We're seeing the threshold between being in the solar neighborhood and being in the galaxy."
Scientists say a new telescope could help them discover more of these tiny moons.
Jupiter's atmosphere is characterized by several strong jet streams that flow west to east, carrying clouds of ammonia and other elements which create colored bands.
The space rock hails from the explosive dawn of the solar system.
The enormous object sits just 20 light-years from Earth.
Musk's Mars ambitions have started to look more like fantasy.
Scott Sheppard's team is using a supercomputer to simulate 79 discovered moons of Jupiter over billions of years to learn how often Valetudo would collide with its neighbors.