Explanation

• The standard approximate value of Earth's gravitational acceleration is 9.8 m/s².
• It is represented by the symbol (g).
• Its value varies slightly with altitude and location.

Last verified on 09-11-2026

Explanation

• Earth intercepts approximately 0.00000005% of the Sun's total energy output.
• This is roughly one two-billionth of the Sun's total energy.
• Only a tiny fraction of the Sun's energy reaches Earth.

Last updated 08 Nov 2026 by NA

Explanation

Earth's Rotation 

• - Sidereal Day: Approximately 23 hours, 56 minutes, 4 seconds.
• - Meaning: The time Earth takes to rotate once relative to distant stars.
• - Solar Day: Approximately 24 hours, measured from one noon to the next.
• - Difference: About 4 minutes.

Last updated 08 Nov 2026 by NA

Explanation

• The poles experience six months of the day and six months of the night.
• This is since earth is tilted on its axis.
• Also, due to this, each pole is tilted towards and away from the sun for about six months.
• When the North Pole is tilted towards the sun, it has continuous daylight.

Last updated 08 Nov 2026 by NA

Explanation

• Mars is known as the Red Planet due to its reddish appearance.
• Its surface contains iron oxide (rust) which gives it a red color.
• It is the 4th planet from the Sun in the solar system.
• Mars has two small moons: Phobos and Deimos.
• Mars is often called the “planet of future exploration”.

Last updated by NA on 05-11-2026