chap8

A telescope that uses lens to collect light.

A telescope that uses mirror to collect light.

an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.

a spacecraft designed to go into orbit, esp. one not intended to land.as opposed to a lander.

A theory stating how stars and planets form from spinning and contracting of gas and dust.

A celestial body made of hot gases held together by gravity.

A cloud of gas and dust in outer space, said to be the beginning point of star formation.

A contracting mass of gas that represents an early stage in theformation of a star.

The process of energy production in which the star gets so hot that hydrogen nuclei combine to form helium nuclei.

The surface layer of the sun.

an area of strong magnetic fields on the photosphere.

The continuous flow of charged particles from the sun that permeates the solar system.

A brief eruption of intense high-energy radiation from the sun's surface

The solar energy from the sun derives most process on earth that support out daily activities.

• Astronomy the brightness of a celestial object as it appear brightness diminished by distance.

The brightness of a star as it would be from 32.6 light years away.

An optical instrument that produces a spectrum from a narrow beam of light. Usually projecting a spectrum.

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum.

A graph that compares the properties of stars.

A narrow band of stars on the H-R diagram that run diagonally from the upper right to the lower left.

A small very hot star that is typically the size of a planet.

A massive explosion through which the entire outer portion of a star is blown off.

A star so dense only neutrons can exist in its core.

Low mass stars evolve by consuming hydrogen at  low rates allowing them to live for up to 100 billion years

Intermediate mass stars evolve by consuming hydrogen at  medium rates allowing them to live for up to 10 billion years.

High mass stars evolve by consuming hydrogen at  high rates allowing them to live shorter and die violently.

The remnant of a supernova explosion with a gravitational field so strong that nothing can escape its pull.