asteroids
21 questions tagged asteroids — spanning every one of the seven Ws.
Which Is the Largest Asteroid?
Ceres is the largest object in the asteroid belt, about 940 kilometres across, and is classified as a dwarf planet.
When did the Tunguska event happen?
On 30 June 1908, a huge explosion flattened forest near the Podkamennaya Tunguska River in Siberia.
Why do asteroids come in different colors and types?
Asteroids vary because they formed in different parts of the early Solar System and experienced different heating and collisions. Their colors reflect differences in composition, metal content, and surface weathering.
What is the asteroid belt?
The asteroid belt is a region between Mars and Jupiter where many rocky objects orbit the Sun.
When was the first spacecraft to land on an asteroid?
Hayabusa landed on asteroid Itokawa in 2005. It became the first spacecraft to touch down on an asteroid and later return samples to Earth.
When was the first sample returned from an asteroid?
Japan’s Hayabusa returned the first asteroid samples to Earth in 2010.
When was the first spacecraft to visit an asteroid belt object launched?
NASA’s Galileo mission launched in 1989 and later became the first spacecraft to encounter an asteroid in the main belt, Gaspra, in 1991.
When was the first landing on an asteroid achieved?
The first spacecraft landing on an asteroid was achieved in 2005. Japan’s Hayabusa touched down on Itokawa.
When was the first asteroid sample returned to Earth?
The first asteroid samples were returned to Earth in 2010. Japan’s Hayabusa brought back material from Itokawa.
Whose mission first drilled into a near-Earth asteroid and returned samples?
JAXA’s Hayabusa2 mission achieved the first successful asteroid sample return from Ryugu in 2020. It returned material to Earth in a capsule.
When was the first spacecraft to visit an asteroid launched?
NEAR Shoemaker launched on 17 February 1996 and later became the first spacecraft to orbit and land on an asteroid.
When was the first mission to land on an asteroid completed?
The first asteroid landing was achieved by Hayabusa2’s touchdown on Ryugu in 2019.
Whose spacecraft first returned samples from an asteroid?
Japan’s Hayabusa mission returned the first samples from an asteroid, Itokawa, in 2010. It marked a major breakthrough in sample-return exploration.
Whose spacecraft first landed on an asteroid and returned images from its surface?
That was Japan's Hayabusa2 mission, which touched down on asteroid Ryugu in 2019. It was the first spacecraft to collect samples from a carbon-rich asteroid and bring them back to Earth.
Whose observations first mapped the asteroid belt as a region of many small bodies between Mars and Jupiter?
That mapping emerged from the work of many astronomers, but the earliest discovery belongs to Giuseppe Piazzi, who found Ceres in 1801. Later observations showed that it was part of a much larger asteroid belt.
Whose spacecraft first returned images from the surface of an asteroid?
NASA’s NEAR Shoemaker. In 2000 it became the first spacecraft to orbit and then land on an asteroid, Eros.
How do asteroids end up in the asteroid belt instead of becoming a planet?
Jupiter’s gravity and the early Solar System’s leftover material prevented the belt from forming a full planet, leaving many small rocky bodies instead.
Why does the asteroid belt exist between Mars and Jupiter instead of becoming a planet?
Jupiter's gravity stirred up the region and prevented the small bodies there from merging into a planet. Collisions kept breaking material apart instead of building it up.
When did the first spacecraft land on an asteroid?
The first landing on an asteroid happened on 12 November 2005, when Japan’s Hayabusa touched down on asteroid Itokawa.
When was the first sample return from an asteroid completed?
The first asteroid samples were returned to Earth on 13 June 2010 by Japan’s Hayabusa mission.
Whose observations first showed that the asteroid belt exists between Mars and Jupiter?
Giuseppe Piazzi’s discovery of Ceres in 1801 opened the way to identifying the asteroid belt. Later discoveries by Heinrich Olbers and others showed a whole population of small bodies there.