Space Related Words Dictionary


How much do you know about outer space and space related words? Scientists are still looking for and researching the mysteries that are here. In this article, we will provide some vocabulary related to the space. If you love space, some of these words may be familiar to you. We hope this adds to your knowledge.


Asteroid – A collection of rocks that revolves around the sun like the planets next to Mars and Jupiter

Aurora – Anomalous light shows usually occur at the north pole and south pole. Then they are often known as the northern and southern lights.


Big Bang – A huge expansion of space that made an explosion and created the entire universe. This theory says that the explosion occurred 13 billion years ago.

Black Hole – When a star collapses, it creates a very large gravitational field. Even light cannot escape its gravitational pull.

Blue Moon – A full month that is in the second period of a calendar month.

Binary Stars – Two adjacent stars that revolve around the same gravitational field


Circumpolar Star – A star that you can always see on the horizon, like the North Star

Comet – Has a shape sometimes like a snowball that has a tail. It is ice and rock that orbits the sun rapidly.

Constellation – A group of stars that form a certain pattern and have a name to make it easier to remember.


Dark matter – Matter fills most of the entire universe. However, it is invisible to see and can still be detected by gravity.

Dwarf planet – Space objects that revolve around stars like planets. However, they didn’t quite qualify as planets. For example, some dwarf planets such as Ceres and Pluto.

Dwarf Galaxy – A collection of small galaxies that are commonly found in the universe. It usually contains only millions of stars.


Exoplanets – Planets that revolve around the sun and have orbits that are outside the Earth.

Ecosphere – A place around a star that has resources and can support life.


Flare – A condition in which a star suddenly gives off a burst of energy

Flyby – Space flight that aims to make observations about a material object that is in space.


Galaxy – A collection of many stars located in one cluster. Usually, in a galaxy the size of billions of light years. Galaxies are sometimes oval or spiral in shape.

Gas planets – A planet composed of hydrogen and helium gases. Often called a failed star because of the similar material. Examples include Saturn, Jupiter, Neptune, and Uranus


Hubble’s Law – The law of physics states that if a galaxy is far away, it will move further away from us at a proportional distance.

Hypergalaxy – A large galaxy that has satellites of dwarf galaxies. The Milky Way and Andromeda galaxies are examples of hypergalaxies.


Inferior planets – Opposite of exoplanets. In other words, It is a planet that has an orbital path inside the earth like Mercury and Venus.

Intergalactic – Empty space that fills the path between galaxies

Interstellar – The empty space that fills the paths of stars in the galaxy


Jet stream – Air moving at high speed over the Earth’s atmosphere. This movement causes changes in the weather.


Kepler’s Law – Three statements were made about the motion of the planets by John Kepler, a German astronomer.

Kuiper Belt – The area beyond Neptune’s orbit and the most distant in our solar system. Also, has a large object called pluto and many comets.


Light-year – The unit of distance is how fast light can travel in one year. It is usually used to measure very distant objects such as galaxies.

Lunar eclipse – Natural events that cause the loss of moonlight. It is because of the movement of the earth covering the sun and blocking light from reaching the moon.


Major planets – Planets in our solar system that qualify to be real planets. In other words, asteroids and satellites even pluto are excluded.

Meridian – An imaginary straight line connecting the north and south poles.

Meteor – Commonly called shooting stars. In fact, it is a rock or space asteroid that fell to earth and disintegrated in the atmosphere. In some cases, a large meteor is able to reach the earth and change its name to a meteorite.

Milky Ways – The spiral galaxy where our solar system lives. Also, it has hundreds of billions of stars in one cluster. If you are lucky, you can see it with the naked eye.


Nebula – A large collection of clouds and dust in the sky. It contains raw materials made from crushed stars.

Neutron stars – A giant star that was extinguished by a supernova explosion. It then collapses and becomes the densest matter in the universe.

Nova – A star that shines brightly for several months. This is because the star undergoes a violent nuclear reaction before returning to its original state.


Orbit – The path of an object in space around a star or planet at one time.


Parallax – A change in position occurs when one object is observed from the earth from different points. This is useful for measuring the distance of a star from the earth.

Pulsar – A fast-rotating neutron star that emits a radio wave


Quasar – An object in the universe that lies quite far away and is barely identifiable. This thing is very bright and also very large. Also, it has power that comes from black holes.


Red dwarf – A small star that has light no bigger than the sun.

Red giant – A huge star that had cooled and was about to die. It emits red light.

Rotation – Movement of a celestial object that rotates and rests on its axis,


Satellites – Man-made objects that are tasked with orbiting the earth and other planets. The goal is to collect data in a single object space or channel communication.

Solar eclipse – A natural phenomenon in which all or part of the moon’s body blocks the sun and creates a dark shadow on the earth.

Solar system – A small group of celestial bodies in a cluster around a star. This includes planets, asteroids, moons, and other celestial bodies including dwarf planets.

Star – Gases condense and burn in space and form a sphere. The radiation emitted contains light, heat, and ultraviolet.

Supernova When a star dies, it emits a violent explosion. This huge explosion causes the release of very bright light for months.


Terrestrial planets – A collection of solid planets consisting of metal and rock. They are Mercury, Venus, Earth, and Mars.

Transit – The path of a celestial object that is larger or crosses the meridian and lies in front of the object.


Universe – Unlimited space and time. That means all objects including galaxies, stars, and all existing matter. According to scientists, the observable universe contains 92 billion light years.

Umbra – The darkest space in one shadow due to an eclipse. It could mean the shadow of the moon darkening a part of the earth.


Variable – stars A large star that has a light that is currently fluctuating in brightness.

Void – A gigantic area of empty space between galaxy clusters and galaxy superclusters.


White-dwarf – Stars die and lose their ability to emit light. It turned into the size of the earth

White hole – It is the opposite of a black hole. If a black hole attracts light, a white hole emits white light.


X-Class Flares – Explosion phenomenon on the surface of the sun. That can set off a storm that could affect radio broadcasts.

X-Ray binaries – Strong X-rays emit, binary stars comprising a regular star and a dead star, such as a white dwarf, neutron star, or black hole.


Yellow dwarf – A medium-sized star the size of the sun. Even though his name is yellow, he is actually white. The yellow color will appear when viewed from the earth’s atmosphere.


Zenith – If you are facing up, a straight vertical point directly above your head is called the zenith.

Zodiac – 12 constellations in the sky that depict a certain imagination. Usually used for fortune-telling.


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