Universe

2. a group of stars that appears to form a pattern or picture
3. a tar showing a sudden large increase in brightness and then slowly returning to its original state over a few months
6. a powerful and luminous explosion of a star.
9. dark matter is particles that do not absorb, reflect or emit light.
10. the galaxy that holds or solar system.
13. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun
14. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
16. the natural satellite of the earth, visible at night by reflected light from the sun
18. a planet outside the solar system or untethered to any star.
21. a celestial object that consists of ice and dust moving through space.
22. the big bang is the rapid expansion of matter
23. a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such
24. matter that is composed of antiparticles.

1. celestial body in space that orbits around a larger body
4. a rounded astronomical body that is neither a star nor a remnant of one.
5. a region of space where gravity is so strong that no particles or even electromagnetic radiation such as light can escape from it
7. a celestial object, thought to be a rapidly rotating neutron star, that emits regular pulses of radio waves and other electromagnetic radiation at rates of up to one thousand pulses per second
8. is a gravitationally bound system of the Sun and the objects that orbit.
11. a small very dense star that is typically the size of a planet.
12. an extremely luminous active galactic nucleus, powered by a supermassive black hole.
15. a minor planet of the inner solar system
17. a prominent luminescent part of an interstellar medium.
19. a large planet of low density consisting of mostly hydrogen and helium.
20. a small body of matter from outer space that enters the earth's atmosphere,