Explanation

• Jupiter has the shortest rotation period of all eight planets in the Solar System.
• It completes one rotation in approximately 9 hours and 56 minutes.

Additional information:

• Fastest rotation: Jupiter
• Earth's rotation: Approximately 24 hours
• Mars's rotation: Approximately 24 hours 37 minutes

Last verified on 12-10-2026

Explanation

• The Equator is an imaginary line that divides Earth into the Northern Hemisphere and Southern Hemisphere.
• It is located at 0° latitude.
• It is the largest circle of latitude.
• It is with a circumference of approximately 40,075 km.
• The Equator passes through parts of South America, Africa, and Asia.

Additional information:

• Equator: 0° latitude; divides north and south.
• Prime Meridian: 0° longitude; divides east and west.
• Tropic of Cancer: Approximately 23.5° north latitude.
• Tropic of Capricorn: Approximately 23.5° south latitude.

Last verified on 12-10-2026

Explanation

• Michael Faraday introduced the concept of the electric field in the 19th century.
• He developed the idea of lines of force to explain how electric charges exert forces on one another.

Additional information:

• James Clerk Maxwell later developed mathematical equations describing electromagnetic fields.

Last verified on 12-10-2026

Explanation

• A solar eclipse can damage the retina if the Sun is viewed directly without proper eye protection.
• The Sun's intense light can cause solar retinopathy, which may result in permanent vision damage.
• During a solar eclipse, use certified eclipse glasses that comply with ISO 12312-2; ordinary sunglasses are not safe.

Additional information:

• A lunar eclipse is safe to view with the naked eye because it involves observing the Moon.

Last verified on 12-10-2026

Explanation

• Saturn is the second-largest planet in the solar system.
• Ganymede (Moon of Jupiter) is the largest satellite in the solar system.

Planets and Natural Satellites:

1. Mercury: 0
2. Venus: 0
3. Earth: 1 (Moon)
4. Mars: 2 (Deimos, Phobos)
5. Jupiter: 95
6. Saturn: 274
7. Uranus: 27

Last verified on 02-05-2026

Explanation

• A rainbow forms when sunlight is refracted, reflected, and dispersed through water droplets in the atmosphere.
• Refraction bends the light, while dispersion separates it into seven colors, creating a rainbow.

Last verified on 10-10-2026

Explanation

• The Moon is Earth’s only natural satellite.
• Diameter – 3,474 km
• Distance from Earth – 384,400 km
• Orbital period – 27.3 days
• Surface gravity – 1/6th of Earth
• First human landing – Apollo 11, 1969

Last verified on 18-03-2026

Explanation

• An ammeter is specifically designed to measure electric current.
• A multimeter can also measure current, voltage, and resistance.
• Electric current is measured in amperes (A).
• An ammeter is connected in series with the circuit to measure current.

Additional information:

• Voltmeter: Measures voltage.
• Ohmmeter: Measures resistance.

Last verified on 10-10-2026

Explanation

• Kilometers per second: ≈ 300,000 km/s
• Speed in vacuum: 299,792,458 m/s
• Approximate value: 3 × 10⁸ m/s
• Symbol: c
• Distance traveled in 1 second: About 300,000 km
• Light from the Sun takes about 8 minutes 20 seconds to reach the Earth.

Last verified on 16-05-2026

Explanation

• Mercury is the smallest planet in our solar system.
• Mercury with a diameter of 4,879 km (3031.67 mi).
• Its escape velocity is approximately 4.25 km/s.
• Nearest Planet to Sun.
• Fastest Planet.

Last verified on 23-06-2026