IPC-4B Astronomy Essay

549 Words2 Pages

Sabdy Mariscal
IPC-4B
Astronomy
Astronomy is the science of space beyond earth’s atmosphere like stars, comets, galaxies, nebula, and comets – as well as the large scale of properties of the universe also known as the big picture. However I’m only going to write about stars, comets, galaxies, and the nebula because I think those are the most interesting aspects of astronomy.
Stars have different size, color, and temperature. There are different types of stars; some are smaller than the earth and even bigger than the sun, so there are a variety of stars. Scientist have placed stars on groups based on how they are the same and how they are different. The brightness of a star depends on their surface temperature so the blue and the white stars …show more content…

Comets are made out of dust and ice, and they can only come from two places the Kuiper belt and Oort cloud. Comets spend billions of years in their homes when they approach the inner solar system they start to melt and then grow a tail. The tail can be in front or behind the comet depending where the sun is located at.
The galaxy is a system of millions and even billions of stars, with gas and dust, held together by gravitational attraction. There are many galaxies in the universe and only three different types the spiral, elliptical, and irregular. The spiral galaxy has long twisting arms and has areas where stars are being formed. The elliptical galaxy are close together making the center look like an enormous star, but you can only find old stars creating the elliptical galaxy. The irregular galaxy can look like anything and have different characteristics.
The nebula is a cloud in outer space made of gas and dust and stars are being made in there. There are three types of nebulas the emission, reflection, and planetary. The emission nebula shines with its own light. The reflection nebula is a cloud made of gas and dust and it doesn’t create its own light, but shines from the reflection of nearby stars. The planetary nebula is a ring-shaped nebula formed by an expanding shell of gas around an aging

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