Explanation

• Gamma rays have very high penetrating power.
• They can penetrate deeply into the body and damage cells and DNA.
• The actual danger depends on the radiation dose and exposure conditions

 Last updated on 12 NOV 2026

Explanation

• Venus is the brightest planet.
• It has an atmosphere but no moons.
• It's identical in size, chemistry and gravity.
• It has volcanoes, mountains and sand.
• It's also called Sister Planet of the Earth.

 Last updated on 12 NOV 2026

Explanation

• Venus comes closest to Earth when it is between Earth and the Sun.

• Minimum distance: about 24 million miles (≈ 38 million km).

• This close approach occurs roughly every 584 days.

Additional Information:

• Mercury can be about 33 million miles away when Venus is on the far side of the Sun.

 Last updated on 12 NOV 2026

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