Science

2. Its the measurement of hat is hot and cold.
4. the displacement of spectral lines toward longer wavelengths
6. The study of nature and evolution
9. an instrument used to detect radio emissions from the sky, whether from natural celestial objects or from artificial satellites.
11. a reflective surface, now typically of glass coated with a metal amalgam, that reflects a clear image.
12. the era that started when the gravitational effect of matter began to dominate the effect of radiation pressure

1. the SI base unit of thermodynamic temperature, equal in magnitude to the degree Celsius
3. an instrument for measuring the intensity of light.
5. the scientific study of sight and the behavior of light, or the properties of transmission and deflection of other forms of radiation
7. not influenced by personal feelings or opinions in considering and representing facts.
8. a piece of glass or other transparent substance with curved sides for concentrating or dispersing light rays
10. nonluminous material that is postulated to exist in space and that could take any of several forms including weakly interacting particles