Celestial bodies are a classification of astronomical objects which can be found in the space of the BFDI universe. There are many types of celestial bodies, some of which include planets, stars, moons, asteroids, black holes, nebulae, and galaxies. Some of these cosmic objects are sentient and capable of speech and thought. They range in size greatly: some are thousands of light years in diameter, while others are hundreds of thousands or millions of miles, or roughly the same size as normal objects. Each of object have different varieties to their category.
Planets[]
Planets are a type of cosmic objects that are large objects that orbit around a star. Planets are divided into two main categories, terrestrial, and gas giant. Terrestrial plants are planets made out of rock and metals with molten cores, they are incredibly dense and have a solid surface. Gas giants are much larger than terrestrial planets and are made out of helium and hydrogen, they lack a hard surface but instead have swirling gasses that surround a solid core. BFDI takes place on the Earth as the main setting, and has a few strange looking planets nearby. One is seen in BFDIA 7 and near the Sun in A Taste of Space, and in What's Up Bell's String? in the Marker and Black Hole scene.
Dwarf planets[]
A dwarf planet is like a planet, except it doesn't meet the criteria for a planet, it doesn't have enough mass to clear it's neighborhood surrounding it's orbit. This definition being made in 2006 lead to Pluto no longer being a planet, Eris and other Kuiper belt objects being discovered was the cause for this definition being made.
Stars[]
Stars are luminous ball of gas, mostly hydrogen and helium, held together by its own gravity. Nuclear fusion reactions in its core support the star against gravity and produce photons and heat, as well as small amounts of heavier elements. The Sun is the closest star to Earth. They make symbols in the sky like the Big Dipper. Stars are seen to not effect Objects, Heat or Oxygen wise, unless one is a flammable object, and gets crushed down into said star.
Moons[]
Moons are natural satellites that rotate around a planet. The one we see the most is the Earth's moon in BFDI. They are usually made of rock but in the BFDI universe it has oxygen, so objects can breathe on the moon. The Earth's Moon is shown to be quite large but can be very fragile as a single bolt of lighting causes a giant crack with in it. It also can't lift itself off the earth's surface.
Asteroids[]
An asteroid.
Asteroids are small rocks that rocky objects that orbit the Sun. Although asteroids orbit the Sun like planets, they are much smaller than planets. They allymme crashing onto planets. In the BFDI universe, Asteroids are around the size of an object. When entering the atmosphere of Earth, Their fire doesn't appear to damage objects, and blunt force does hurt them, though doesn't kill them.
Black Holes[]
.png "Black Hole (Goiky's Life).png (668 KB)")
A black hole is a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape it. They are the 1 of a few Bodies to gain sentience in the show. They are the most powerful object but can be crushed down to a smaller size by an Algebralian.
Nebulae[]
Nebulae are distinct luminescent part of interstellar medium, which can consist of ionized, neutral, or molecular hydrogen and also cosmic dust. Nebulae are often star-forming regions, such as in the "Pillars of Creation" in the Eagle Nebula. The only one ever shown to be sentient is Great Orion Nebula, a recommended character.
Galaxies[]
![Galaxy Pillow (A Recommended Character who is [possibly] a galaxy).](/wiki/File:Galaxy_pillow.png "Galaxy pillow.png (760 KB)")
![Galactic Leafy (A Recommended Character who is [possibly] a galaxy).](/wiki/File:BFDIA_GalacticLeafy.png "BFDIA GalacticLeafy.png (37 KB)")
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek galaxias, literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a hundred million stars to giant galaxies that contain trillions of stars.
Quasars[]
A quasar.
A quasar is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a "quasi-stellar object" (QSO). The emission from an AGN is powered by a supermassive black hole with a mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous accretion disc. Gas in the disc falling towards the black hole heats up because of friction and releases energy in the form of electromagnetic radiation. The radiant energy of quasars is enormous; the most powerful quasars have luminosities thousands of times greater than that of a galaxy such as the Milky Way. Usually, quasars are categorized as a subclass of the more general category of AGN. The redshifts of quasars are of cosmological origin. One is seen in TPOT 4 when The S! gets shot twice by it, the second time causes the death of 3 Funny Plants.