SPACE

In general relativity, a _____ ____ is a hypothetical region of spacetime and singularity which cannot be entered from the outside, although energy-matter and light can escape from it.

White Hole

also called minor planets or planetoids, are a class of astronomical object. The term is generally used to indicate a diverse group of small celestial bodies that drift in the solar system in orbit around the Sun.

Asteroid

A celestial object that has a gravitational field so strong that light cannot escape it and that is believed to be created especially in the collapse of a very massive star.

Black Hole

A celestial body that appears as a fuzzy head usually surrounding a bright nucleus, that has a usually highly eccentric orbit, that consists primarily of ice and dust, and that often develops one or more long tails when near the sun.

Comet

is called dark because it does not appear to interact with observable electromagnetic radiation, such as light, and so it is undetectable by existing astronomical instruments.

Dark Matter

A ______ is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek ________ (γαλαξίας), literally "milky", a reference to the _____ ___. ... Many ________ are thought to have supermassive black holes at their centers.

Galaxies

a region of the solar system beyond the orbit of Neptune, believed to contain many comets, asteroids, and other small bodies made largely of ice.

Kuiper Belt

A celestial object consisting of an extremely dense mass of neutrons, formed at the core of a supernova, where electrons and nuclei are compressed together so intensely by the force of gravity that protons and electrons merge together into neutrons

Neutron Star

a spherical shell of cometary bodies believed to surround the sun far beyond the orbits of the outermost planets and from which some are dislodged when perturbed to fall toward the sun — compare kuiper belt.

Oort Cloud

a massive and extremely remote celestial object, emitting exceptionally large amounts of energy, and typically having a starlike image in a telescope. It has been suggested that _______ contain massive black holes and may represent a stage in the evolution of some galaxies.

Quasar

A ______ _____ (also termed an interstellar planet, nomad planet, free-floating planet, unbound planet, orphan planet, wandering planet, starless planet, or sunless planet) is a planetary-mass object that orbits a galactic center directly.

Rogue Planets

A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

Supernova

The physical _________ is defined as all of space and time (collectively referred to as spacetime) and their contents. Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.

Universe

Meteor

a space rock that hits the atmosphere of the Earth. It's also another word for a shooting star.