Describing the universe
In terms of time distance and organization
What is astronomy?
Astronomy is The scientific study of the universe. The study of astronomy is the study of the universe is important for the potential benefits to humans. Private foundations and industry also fund research in astronomy. For example ,studies of how stars shine may one day lead to improved or new energy sources on earth. The astronomers may also learn how to protect us from potential
Objectives
1.describe characteristic of the universe in terms of time distance and organization
2.identify the visible and nonvisible parts of the electromagnetic spectrum
3.compare refracting telescopes and reflecting telescopes
4. Explain how telescopes for nonvisiable electromagnetic radiation differ from light telescopes
Universe
All existing matter and space considered as a whole
Light year
Astronomers also use the speed of Light t measure distance.
Astronomical unit
The average distance between the earth and the sun approximately 150million kilometers
Electromagnetic spectrum
All of the frequencies or wavelengths of electromagnetic radiation
Refracting telescope
A telescope that uses a set of lenses to gather and focus light from distant objects
Reflecting telescope
A telescope that uses a curved mirror to gather and focus light from distant objects
Difference between astronomical unit and light year
The astronomical unit is the distance from the sun to the earth. The astronomical unit is 150,000,000 km as the planets move further from the sun and when they move closer to the sun the astronomical unit gets smaller such as mars vs. Jupiter And smaller when it's in mars . The light year which is 10 trillion km are similar to the astronomical unit because they both km alway
The organization of the universe
In the universe there are 8 plants which are mercury Venus earth mars Jupiter Saturn Uranus and Neptune which this make up the solar system and the Milky Way in the universe there are also stars and some of the planets are made up of gas and others of rock
Describe the electromagnetic spectrum
Electromagnetic spectrum : the range of wavelengths or frequencies over which electromagnetic radiation extends . The invisible and the visible EM spectrum are different because one is not visible to human eyes and the visible is a short wavelength of visible light that are blue and violet.
Compare the refracting and reflecting telescopes
In the reflecting telescope it is unlike objective lenses in refracting telescope mirrors in reflecting telescope can be large in the refracting telescope have an objective lens that bends light that passes through the lens . And the reflecting telescope each telescope are a pair called the keck telescopes in Hawaii.
Compare invisible light and space based telescopes
An invisible light telescope has each type of telescope has each type of electromagnetic radiation provides scientists with information about objective in space . One problem with using telescope to detect invisible electromagnetic radiation . The space based telescope is space craft that contains telescope and other instruments have been launched to investigate planets . While ground based telescopes have been critical in helping astronomers learn about the universe.