00:00As well as stars, galaxies and quasars, Gaia also observes objects in our solar system,
00:21measuring their positions and brightnesses at different times.
00:26By far the largest group of solar system objects in Gaia's data release 3 are 154,741 asteroids,
00:37for which Gaia has determined the orbits.
00:40Depending on their orbits, one can distinguish different groups of asteroids.
00:44Most of the asteroids are in the main belt between the orbits of Mars and Jupiter.
00:50Over a period of about 10,000 years, Jupiter's powerful gravity can perturb an asteroid's path so strongly that some of them become Mars crossers.
01:01Do you notice another group that is around the distance of Jupiter?
01:05They are the so-called Trojans. They are collected in two clusters, preceding and following the giant planet, but never getting close to it.
01:14If we move beyond the orbit of Neptune, we find trans-Neptunian objects.
01:20Gaia observed the brightest 24 members of this population.
01:24Let's now focus again on the internal regions of the solar system.
01:38Back in the inner solar system, we find objects that come close to the Earth and sometimes cross its orbit.
01:44They were brought to the inner solar system from the main belt due to gravitational perturbations by Jupiter and other planets.
01:51Due to close encounters with the terrestrial planets, the orbits of near-Earth asteroids reach large inclinations with respect to the Earth's orbit
01:59and can also come very close to the Sun, where they experience strong heating.
02:04None of the known near-Earth objects is a danger to Earth in the coming decades,
02:09but it is very important to determine their orbits precisely.
02:14We now move close to the Earth and observe this group of 446 near-Earth asteroids.
02:22Finally, we move into the main belt and see many of the 153,220 asteroids passing by.
02:39It's a very special moment to be seen.
02:40A few years later, it'll be found in the following regions of the Earth Earth.
02:42For the first time it's a chance to come back in the fall of the sky,
02:43it must be natural and to clear where the Sun will be placed sometimes.
02:44A few years later, I see the Sun will be placed by a shadow of the Moon sky.
02:49Once we will see the Sun will stay up here and be placed in the air to the moon.
02:53A few years later, I see the Sun will be placed in the air to the moon and the stars.
02:58The AR砂 gates will be placed at the Moon in the air where the Sun will be placed around.
03:02The Sun will be placed upon the Sun.
03:03The Sun will be placed on the surface of the Sun.
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