Space Exploring Crossword

These can be sorted into three main categories by their shape: spirals, ellipticals, and irregulars.
This may be infinite because we are, and can observe only a small part of it.
A natural object located outside of the Earth's atmosphere such as the moon or an asteroid.
The largest known star in this galaxy is UY Scuti.
The study of the universe and the objects in it.
Ours is a collection of eight planets that orbit our Sun.
A cosmic energy engine that produces heat, light, UV rays, and other forms of radiation.
The condition in which the gravitational forces that act on mass are greatly reduced.
Modern astronomers divide the sky into eighty-eight of these with defined boundaries.
An optical instrument that, like a prism, separates light into its spectral colours.
An example was when Mars, Jupiter, and Saturn appeared to loop backward for a few months in their route across the sky.
A planet's distance from the Sun.
During this, the Moon casts two shadows on Earth: the umbra and the penumbra.
When Earth blocks out the Sun's light shining on the Moon, making the moon briefly disappear, fully or partially.
These people study one of the oldest fields of science, astronomy, and usually work for universities or research institutions.
This theory states that the universe formed when an infinitely dense point suddenly and rapidly expanded in a single moment.
Matter in the universe that is invisible because it does not interact with light or any other kinds of radiation.
This emits bursts of electromagnet radiation, and is often followed by Coronal Mass Ejection.
This is what it is called when a star explodes.
A region on the Sun's surface that is cooler than the surrounding areas.
Any orbit which keeps an object at a fixed point in the sky over the course of multiple rotations of Earth.
One complete orbit of the Earth around the Sun.
A device placed in orbit around Earth or another celestial object.
The best known example of one is the Big Dipper as a part of the Great Bear.
Our main one is located in an area between the orbits of Mars and Jupiter.
Any observable occurrence relating to astronomy.
The study of the universe and the objects in it.
The largest that we have found has a mass of 17 billion Suns and is at the centre of disk galaxy NGC 1277.
A natural object located outside of the Earth's atmosphere such as the Moon or an asteroid.
A thin layer of the sun with a red cast to it.
Some features of this are the nucleus, coma, dust tail, and ion tail.
This part of the Sun can only be seen from Earth during a total solar eclipse, or by using a coronagraph telescope.
When this occurs, a large amount of plasma is thrown out through the corona at a speed of more than 1000km/s.
A day when the hours of daylight and the hours of night are equal.
The distance that a beam of light can travel through space in one year.
The process in which the nuclei atoms fuse together and form large atoms.