Describing the universe

In terms of time, distance, and organization

What is astronomy ?

Astronomy has a lot of value because it describes to us the universe and how it looks and what it's made out of. With out astronomy we wouldn't know what's made out astronomy can be able to learn more about the origin of the earth.


1) Describe characteristic of the universe in terms of time, distance and organization.

2) Identify the visible and nonvisable parts of the electromagnetic spectrum.

3) Compare reflecting telescope

4) Eplains how telescope for nonvisable electromagnetic radiation differ from ligh telescope.

Describe the electromagnetic spectrum

The shortest wavelengths of visible light are blue and violet, and the longest wavelengths of light are orange and red. Visible light is also a form of energy that is part of the electromagnetic spectrum. Also, visible light is broken into up into different colors because they have different wavelengths. Only visible light can be seen with the human eyes.

Invisible light also has its differences from visible light, like it can not be seen with the human eyes. Invisible wavelengths are shorter if the color is violet and are longer if the color is red. Invisible waves are also known as infrared waves, microwaves, radio waves, ultraviolet rays, x rays, and gamma rays. Since the invisible light can not be seen with the human eyes, invisible radiation has to be detected with instruments that were designed for detecting electromagnetic radiations.

Comparing Refracting and Reflecting Telescopes

A refracting telescope is used as a set of lenses to gather and focus light from distant objects. A refracting telescope uses the lens to bend the light and has a clear lens. They also uses lens to focus different colors of light at a different distant. These lenses are also very difficult to make.

Reflecting telescope that uses a curved mirror to gather and focus light from distant objects. These lenses are easier to make than the refracting lenses. The mirrors inside the telescope can be made larger without affecting the quality of the image and focuses the light to the second mirror. The second mirror inside the telescope is used to reflect the light .

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