Describing The Universe
In Terms of Time, Distance, and, Organization
The Value of Astronomy
Objectives
2. Identify the visible and nonvisible parts of the electromagnetic spectrum.
3. Compare refracting telescopes and reflecting telescopes.
4. Explain how telescopes for nonvisible electromagnetic radiation differ from light telescopes.
Universe
The universe is a large field of billions of Galaxy's and those galaxy's have gasses, dust, planets and solar systems.
Light Years
A light year is the speed of light to mesure the distance of how the light travels in a year, it is used for measuring other galaxy's.
astronomical Unit
The Astronomical unit is measured in billions of kilometers is the measurement in the body of the solar system.
Electromagnetic spectrum
All of the frequencies or wavelengths of electromagnetic spectrum 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.
Describe The Elecromagnetic spectrum
The visible light is part of the electromagnetic spectrum it is only visible to the human eye. That light that gets hit it brakes into many different colors the shortest light is blue and violet there are different kind of colors for example red, blue, orange, violet and yellow.
The invisible light is invisible to the human eye, but human have special instrument to help us detect the wavelengths wavelengths are all over the place. There are weak wave like the radio wave which is a long wave and there are also short wave that are dangerous like the X-rays and gamma rays they are used for like doctors.
Describing Reflecting and Refracting Telescope
The reflecting telescope uses curved mirror to gather and focus light from distant objects. To begin with, they invented the reflecting telescope because it is easer to make. Also the first telescope that was built was by this person named Isaac Newton by the mid-1600. They invented the telescope because it was easer to make than the refracting telescope; the reflecting telescope has two mirrors that are easy to make than making heavy and expensive lenses.