Q:

Why does the planet have day and night?

A:

The Earth's rotation means that the sun is visible during certain times and blocked during other times. When the sun is visible, it is daytime; when it is blocked, night has come.

In ancient times, people thought that the Earth remained still. To them, the sun appeared to rise and set on a regular but varying basis. Later, astronomers discovered that the Earth orbits the sun and that the Earth rotates in approximately 24 hours. However, the Earth's axis is tilted, which causes days to become longer during parts of the year and shorter during other parts of the year. These fluctuations are fairly small, but they are enough to cause significant temperature variations. These variations create the different seasons.

Day and night also vary based on how close an area is to the equator. Regions close to the equator have only slight variations during the year, so their longest and shortest days are similar in length. Regions far to the north and south of the equator, on the other hand, experience significant variations, and there may be times of the year when the sun never sets or never rises. These variations can cause extreme weather scenarios in these parts of the world.


Is this answer helpful?

Similar Questions

  • Q:

    What does "Mars in Gemini" mean?

    A:

    Mars in Gemini is an astrological marker which signifies that the planet Mars was located in the constellation of Gemini at the time of birth. In astrology, Mars is said to reveal a person's basic animal nature including sexuality, aggressive instincts, and drive. If an individual has Mars in Gemini, he or she will be passionate about words and will use them as weapons when angered.

    Full Answer >
    Filed Under:
  • Q:

    Why did astronomers suspect a planet beyond Uranus?

    A:

    Astronomers suspected another planet beyond Uranus when it was noted that Uranus was being slightly pulled out of orbit at points. This led to speculation that gravity from another planet was causing the pull.

    Full Answer >
    Filed Under:
  • Q:

    What is the Rare Earth hypothesis?

    A:

    The Rare Earth hypothesis states that Earth-like planets, which harbor complex life, are rare due to the intricacies involved in the formation of a planet that meets the criteria to create life. The hypothesis details the low probability of planets forming in the same way as Earth.

    Full Answer >
    Filed Under:
  • Q:

    What are moons?

    A:

    A moon is a natural satellite consisting of solid material that naturally orbits a planet or dwarf planet. Although the Earth has just one moon, there are other planets that have more, and some that even have none. Moons and their planets often have very symbiotic, or close relationships.

    Full Answer >
    Filed Under:

Explore