Infinity-Science

Jupiter's core is non-metal, but due to the immense pressure inside Jupiter, the core has become a metal. This metal is liquid metallic hydrogen. @LAQMC

From the astronomical point of view there are two types of winds, solar winds that exist in outer space, and planetary winds that occur on planets. The distinction between these two type of winds is that solar wind represents the movement of gases or charged particles from the sun through space while planetary wind represents the out-gassing of light chemical elements from a planet's atmosphere into space. @LAQMC

The main difference between asteroids and planets is that asteroids never grew large enough to become planets. @LAQMC

Galaxies are often found in a group or clusters. One cluster may have 30 or so galaxies in it. @LAQMC

The universe is what we usually think of as the totality of known or supposed objects and phenomena throughout space. The observable part alone contains over ten billion trillion stars arranged in about 100 billion galaxies, and is estimated to be around 156 billion light years in diameter. By definition, we are at the centre of our observable universe, but it is totally unknown where we are in the universe as a whole.

Only one side of the moon ever faces Earth. The moons period of rotation is exactly the same as it's period of orbit.

The moon's gravity is 17% of the Earth's so astronauts in space suits can jump 4 m high on the moon.

When Galileo viewed Saturn for the first time through a telescope, he described the planet as having "ears". It was not until 1655 that Christian Huygens suggested the crazy theory that they might be an enormous set of rings around the planet.

The brightest astronomical event in historic times was the supernova of 1054, which produced the Crab Nebula. The supernova was far brighter than Venus. It was bright enough to be visible in daylight and to cast a shadow at night. We know of it through the astronomical records of China, Japan, and the Middle East.

The Sun also causes tides on Earth, and are about half the strength of the Moon's.

The orbit of Neptune's moon Triton is slowly decaying, meaning it is getting closer to the planet. In 3.6 billion years time Triton will drop below the Roche limit, and Neptune's tidal forces will tear Triton apart, forming a ring around the planet

The Crab Pulsar is a neutron star just 10 km across, has a mass of between 1.4 and 2 times that of the Sun, and spins at 30 times per second

The typical size of a meteor is about one cubic centimeter, which is equivalent to the size of a sugar cube.

Uranus' axis is at 97 degrees. which means that it orbits on its side. (Most of the planets spin on an axis nearly perpendicular to the plane of the ecliptic but Uranus' axis is almost parallel to the ecliptic.

The average temperature at the surface of the Sun is 6,000 degrees C. Brown dwarf star CFBDSIR 1458 10b is no hotter than a cup of coffee

A new star is born in our galaxy every 18 days.

The first asteroid discovery in history occurred in 1801 with the discovery of asteroid Ceres, by Giuseppe Piazzi, though it was considered a planet at the time. Ceres is currently the largest known asteroid.

In the universe, matter is so thinly dispersed that space is as empty as a building twenty miles long, twenty miles wide, and twenty miles high that contains only a single grain of sand.

Because of the speed at which the sun moves, it is impossible for a solar eclipse to last more than 7 minutes and 58 seconds.