Space

4. Is an astronomical object comprising a luminous spheroid of plasma held together by self-gravity.
7. Are extremely dense regions in space where gravity is so strong that nothing, not even light, can escape from them.
8. Is the scientific study of celestial objects in space, including stars, galaxies, black holes, and nebulae.
9. Space is full of fascinating phenomena, such as supernovae, quasars and pulsars.
10. Is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.

1. Are planets located outside our solar system, orbiting other stars.
2. The study of the potential for life beyond Earth, including the search for microbial life on Mars and the study of extreme environments on Earth as analogs for extraterrestrial life.
3. Is a small rocky or metallic body in outer space. Meteoroids are distinguished as objects significantly smaller than asteroids, ranging in size from grains to objects up to a meter wide.
5. Is an icy, small solar system body that warms and begins to release gases when passing close to the Sun, a process called outgassing.
6. They are rocky, metallic or icy bodies with no atmosphere.