Astr - 101 Notes Of A Ravenclaw

First-Year notes of a Ravenclaw student. Edition one. Part One of Seven. ASTR - 101. Astronomy. Professor Afolayon as the Instructor. Lessons One through Nine. DOES NOT INCLUDE HOMEWORK INFORMATION. Volume One in the "First Year" Class Series.

THIS IS NOT TO BE SUBSTITUTED FOR LESSONS.

Last Updated

05/31/21

Chapters

5

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3,592

Lesson Three - Venus And Earth

Chapter 3
  • Venus is a terrestrial planet and the second from the Sun in our solar system.
    • A terrestrial planet is a celestial body with a solid, rocky appearance.
    • Astronomers have known of Venus's existence for thousands of years.
      • The planet received its name from Roman Goddess, Venus.
    • Aside from the Moon, this planet is the brightest entity in the night sky.
      • This fact has given it the nicknames "Morning Star" and "Evening Star" as it it is seen best just after sunrise and just after sunset.
    • Venus approaches Earth far closer than any other planet.
    • Often called the sister planet of Earth due to their similarities in size, the two are very different.
      • The atmosphere of Venus is made of carbon dioxide and covered with clouds of sulfuric acid.
        • Sulfuric acid is highly poisonous to humans.
        • Due to the thick atmosphere, it was nearly impossible to see the surface of Venus prior to the twenty first century.
      • The gravitational pressure of Venus is ninety-two times that of Earth.
      • Like Mercury, Venus has no moons.
  • Earth is the third planet from the sun and one of the four terrestrial planets in our solar system.
    • The planet is highly impacted by the various species that inhabit it.
      • And example is that early life forms were able to completely change the planet's atmospheric conditions.
        • This ability to impact the Earth a such high a level means that life is an important force in changing the celestial body.
          • Due to this fact, life is known as a biosphere.
    • 71% of Earth is made of salt water oceans and the remaining 29% is made of rocky land that form continents and islands.
      • Earth is the only celestial body where liquid is known to be present.
    • The plant interacts with both the Sun and the Moon, particularly, in our solar system.
      • The Earth orbits the sun, circling once ever three hundred and sixty five and one fourth days, respectively.


*One spin of the Earth is known as a day while every one orbit around the Sun is called a year. This is why there are about three hundred and sixty five days in a year.*


    • The celestial body has only one moon that is simply known as the "Moon."


*And image is given at the end of the lesson (found here) depicting Mercury, Venus, Earth, Earth's Moon, Mars and Ceres. Saving the image is requested by Professor Afolayan as it may "come in handy" during Midterms*



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