Explanation

• Remote Sensing is the science of collecting information about the Earth’s surface without direct contact.
• It is mainly done using satellites equipped with special sensors and cameras in space.
• These satellites capture images and data used for mapping, weather forecasting, and environmental monitoring.

Last verified on 12-03-2026

Explanation

• GPS (Global Positioning System) is used for identifying the location of objects on Earth.
• GPS provides accurate positioning and timing information, enabling users to determine their precise location anywhere on Earth.
• It is a network of satellites orbiting the Earth.
• It provide location information and timing signals to GPS receivers on the ground.

Last verified on 12-11-2026

Explanation

• Stars produce energy mainly through nuclear fusion in their cores.
• Hydrogen nuclei combine to form helium and release energy.
• The Sun also generates its energy through nuclear fusion.

Last verified on 11-11-2026

Explanation

• Our Solar System is located in the Orion Arm of the Milky Way galaxy.
• It including the Sun and eight planets.
• It consists of about 100–400 billion stars along with large amounts of gas and cosmic dust.

Additional information:

• The Milky Way is a spiral galaxy with a diameter of about 100,000 light-years.
• The nearest large galaxy to the Milky Way is Andromeda, located about 2.5 million light-years away.

Last verified on 11-03-2026

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 verified on 11-11-2026