Tag Archives: Astronomy

Why do Venus and Uranus Rotate Clockwise from the other Planets ?

Collision with an asteroid

  • Venus rotates clockwise while Uranus rolls on its side as it orbits the Sun.
  • Venus‘s tilt is 177 degrees and, Uranus‘s axial tilt is 98  degrees. So they’re both considered to  have retrograde rotation.

Planets Rotation

  • 2 large impacts in Venus’s history. The first impact’s result was a satellite for Venus but after 10 million years Venus encountered another gigantic impact on the opposite side of the planet from the first impact which reversed its rotation and the satellite it once had spiraled in and collided with the planet itself.
  • Uranus also had counterclockwise rotation until a gigantic impact changed everything.

Solar System

The meteor Effect

The meteor Effect

Venus and Uranus Rotate Backwards

Why does the Sun Rise in the East and Set in the West ?

Because Earth rotates toward the East.

The sun stays in its position at the center of our solar system. It doesn’t rise and set. But it appears to rise and set because of the Earth’s rotation on its axis. It makes one complete turn every 24 hours. It turns toward the east. That’s why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.

Sunrise and Sunset

Why does the Sun rise in the East and set in the West

Earth rotates toward East

How does the Sun move

Why is the Sky Dark at Night ?

Because the universe is still expanding, the distant stars and galaxies are getting farther away all the time.

  • The universe was born about 13.8 billion years ago in a fantastic explosion called the Big Bang. It began at a single point and has been expanding ever since.
  • If the universe were infinitely old as well as infinitely large, it would not contain enough fuel to keep the stars shining forever and to fill up all of space with starlight. And so the night sky is dark.
  • In astrophysics and physical cosmology, Olbers’ paradox, named after the German astronomer Heinrich Wilhelm Olbers (1758–1840) and also called the “dark night sky paradox”, is the argument that the darkness of the night sky conflicts with the assumption of an infinite and eternal static universe.

Night Sky

Olber's Paradox - Why is the Sky Dark at Night

Olber Paradox - Infiinite or Finite Universe

Olber''s Paradox Explanation

Earth is not facing the sun, it's why it is dark

But without the dark we never see the stars