Explanation

• The age of the Universe is approximately 13.8 billion years.

Additional information:

• Age of the Earth: ≈ 4.54 billion years
• Age of the Solar System: ≈ 4.6 billion years
• Age of the Milky Way: ≈ 13.6 billion years
• Big Bang: Occurred about 13.8 billion years ago

Last verified on 20-07-2026

Explanation

• The Troposphere contains about 75% of the atmosphere's mass.
• It is the lowest layer of Earth's atmosphere.
• Altitude Range: About 8 km at poles to 15–18 km at equator.
• Main Gases: Nitrogen (78%), Oxygen (21%), and other gases.ev

Verified & Updated

Explanation

• In a nuclear reactor, energy is produced due to a controlled chain reaction.
• A controlled chain reaction releases energy steadily and safely.
• Control rods are used to regulate the number of neutrons and prevent excessive reactions.
• This controlled process is used to generate electricity in nuclear power plants.

Additional information:

• An uncontrolled chain reaction occurs in nuclear bombs.

Last verified on 11-07-2026

Explanation

• The hottest planet in our solar system is Venus.

Additional information:

• The black planet is called Venus.
• The second-closest planet to the Sun is Venus.
• Slowest Rotating Planet
• No moon
• Similar in size to Earth

Last verified on 30-03-2026

Explanation

• Neptune is the farthest planet.
• It was visited by the spacecraft Voyager 2.
• It's is a very windy place.
• It has six rings.
• It has 14 moons.

Last verified on 24-06-2026

Explanation

• The bodyguard of the Earth is Jupiter, which protects Earth from many comets and asteroids due to its strong gravity.
• Jupiter attracts or deflects space objects that might otherwise hit Earth.
• It is the largest planet in the solar system.
• Its strong gravitational field acts like a “shield” for inner planets.
• That is why it is often called Earth’s protector.

Last verified on 14-06-2026

Explanation

• The sunset on Mars appears blue due to how dust scatters sunlight.
• Mars has a thin atmosphere filled with fine dust particles.
• These particles scatter red light away and allow blue light near the sun’s direction.
• This creates a bluish glow around sunset and sunrise.
• It is opposite to Earth’s red/orange sunsets.

Last verified on 14-06-2026

Explanation

• The term "stellar" is used for stars and things related to stars.
• It comes from the Latin word "stella", meaning star.
• In astronomy, stellar objects include stars and star-related phenomena.
• Scientists use the term when studying the formation, evolution, and properties of stars.

Last verified on 11-06-2026

Explanation

• The gravitational force keeps planets in orbit around the Sun.
• It is the force of attraction between masses.
• The Sun’s large mass pulls planets toward it.
• Planets keep moving forward, creating stable orbits.
• This balance results in circular or elliptical motion.

Last verified on 10-06-2026

Explanation

• South Pole is called the "dark side of the Moon".
• "Dark" means "unknown" instead of "lacking sunlight".

Last verified on 06-06-2026