Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
Astronomy
|
The branch of science that deals with celestial objects, space, and the physical universe as a whole.
|
|
|
Space
|
A continuous area or expanse that is free, available, or unoccupied.
|
|
|
Earth
|
The planet on which we live, the third planet from the sun in the solar system.
|
|
|
Sun
|
The star around which the earth orbits. The sun is the central body of the solar system. It provides the light and energy that sustains.
|
|
|
Orbit
|
The curved path of a celestial object or spacecraft around a star, planet, or moon, esp. a periodic elliptical revolution.
|
|
|
Solar eclipse
|
An eclipse in which the sun is obscured by the moon.
|
|
|
Lunar eclipse
|
An eclipse in which the moon appears darkened as it passes into the earth's shadow.
|
|
|
Stars
|
A fixed luminous point in the night sky that is a large, remote incandescent body like the sun.
|
|
|
Black hole
|
A region of space having a gravitational field so intense that no matter or radiation can escape.
|
|
|
Moon
|
The natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.
|
|
|
Constellation
|
A group of stars forming a pattern that is traditionally named after its apparent form or identified with a mythological figure.
|
|
|
Supernova
|
A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.
|
|
|
Comet
|
A celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away.
|
|
|
Asteroid
|
A small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles (1,000 km) across to dust particles.
|
|
|
Zero gravity
|
The state or condition in which there is no apparent force of gravity acting on a body, either because the force is locally weak, or.
|
|
|
Quasar
|
A massive and extremely remote celestial object, emitting exceptionally large amounts of energy, and typically having a starlike image.
|
|
|
Wormhole
|
A hypothetical connection between widely separated regions of space-time.
|
|
|
White hole
|
A hypothetical celestial object that expands outward from a space-time singularity and emits energy, in the manner of a time-reversed.
|
|
|
Galaxy
|
A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
|
|
|
Planet
|
A celestial body moving in an elliptical orbit around a star.
|
