Space Words Crossword

Process in which the nuclei of atoms fuse together an form larger atoms.
Star system with two stars.
Large cloud of dust and gas
Matter in the Universe that is visible because it does not interact with light or any other kind of radiation.
Orbit in which a satellite orbits Earth at the same rate as Earth rotates.
Full range of electromagnetic radiation, organized by wave length from very long to very short.
Optical instrument that, like a prism, separates light into its spectral colours.
Region on the Sun's surface that is cooler than the surrounding areas.
Large, often curved, bright stream of particles extending outward from the photosphere into the corona.
Thin but steady steam of subatomic particles flowing out of the Sun's surface in al directions.
Apparent reversal of a planet's path relative to the starry backdrop.
One complete spin of Earth on its axis, which takes almost 24 hours.
Day of the year with the longest period of daylight, representing the start of summer.
Day of the year with the shortest period of daylight, representing the start of winter.
Day when the hours of daylight and the hours of night are of equal length.
Planet's distance from the Sun.
Condition in which the gravitational forces that act on a mass are greatly reduced.
Layer of the Sun usually considered to be the boundary between the inside and the outside of the Sun.
Outermost layer of the Sun, extending beyond the chromosphere for millions of kilometres.
Thin layer of the Sun, lying above the photosphere, and with a red cast to it.
Star in its first stage of formation.
An observable occurence relating to astronomy.
Smaller recognizable star patterns within a larger constellation.
Energy that travels in waves of varying lengths.
A device placed in orbit around Earth or other celestial objects.
Series of dark lines that appears across a star's light spectrum and indicates the chemical elements in the star's composition.
A massive, gravitationally bound system that consists of stars, stellar objects, black holes, and an unknown component of dark matter. Ours is the Milky Way.
All of space and time and its contents, which includes planets, moons, stars, galaxies, the contents of intergalactic space and all matter and energy.
Is made of a different type of material: rock, gas or ice.
A natural science that studies celestial objects and phenomena.
A scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of the Earth.
The gravitationally bound system comprising the Sun and the objects that orbit it.
The nearest ________ to the Earth is the Sun.
A unit of length used to express astronomical distances.
An astronomical body orbiting a star.