Space Exploration Club 2025-2026

What is the main component of the solar wind?

• Neutral Nitrogen and Oxygen atoms

• Cold, molecular hydrogen gas

• Solid dust particles and micrometeoroids

• High-energy protons and electrons

Answer explanation

The solar wind is plasma, primarily ionized hydrogen and helium, consisting of protons and electrons flowing outward from the Sun's corona.

Which of Kepler’s Laws relates a satellite’s orbital period to its semi-major axis?

• Kepler’s Third Law (Law of Periods)

• Newton’s Law of Universal Gravitation

• Kepler’s First Law (Law of Orbits)

• Kepler’s Second Law (Law of Areas)

Answer explanation

This law states that the square of the orbital period is proportional to the cube of the semi-major axis (T^2∝a^3).

What is the primary role of the Earth's magnetosphere in protecting life and technology on the surface?

• It creates the ozone layer, which absorbs harmful UV radiation.

• It regulates the Earth’s surface temperature through magnetic cooling.

• It acts as a shield, deflecting the majority of the Sun’s charged particles (solar wind).

• It traps and slows down solar X-rays.

Answer explanation

The magnetosphere's magnetic field creates a cavity that deflects the incoming high-speed plasma (solar wind), preventing it from reaching the surface.

Which solar phenomenon is a large, explosive eruption of plasma and magnetic field from the Sun's corona that can significantly impact Earth's space environment?

• Solar Prominence

• Coronal Mass Ejection (CME)

• Sunspot

• Solar Flare

Answer explanation

A CME is a massive burst of solar wind, other plasma, and magnetic flux that erupts from the Sun and, if directed toward Earth, causes geomagnetic storms.

What is the collective name for the four largest moons of Jupiter?

• The Outer Satellites

• The Galilean Moons

• The Jovian Moons

• The Ring Moons

Answer explanation

These moons are named after Galileo Galilei, who observed them in 1610.

What is space weather?

• The amount of interstellar dust passing through the solar system.

• The daily forecast of temperature and pressure at 100 km altitude.

• The climate conditions on the surface of Mars.

• Solar and near-earth conditions affecting technology and performance.

Answer explanation

The conditions in space (near Earth) and on the Sun that can influence the performance and reliability of space-borne and ground-based technological systems.

In an elliptical orbit, where does a satellite move at its fastest speed?

• At apogee (farthest point from Earth)

• Speed is constant throughout the orbit

• At perigee (closest point to Earth)

• When crossing the semi-major axis

Answer explanation

Kepler's Second Law dictates that the satellite must speed up when closer to the central body to conserve angular momentum, making perigee the point of maximum speed.

What visible phenomenon on Earth is a result of charged particles from the solar wind interacting with the Earth’s upper atmosphere?

• Tides

• Northern and Southern Lights

• Lightning Storms

• Solar Eclipse

Answer explanation

Aurorae occur when charged particles, funneled by the magnetosphere towards the poles, collide with atmospheric gases, causing them to emit light.

Which altitude range is generally classified as Low Earth Orbit (LEO)?

• Above 35,786 km

• 2000 km to 35,786 km

• 10 km to 100 km

• 180 km to 2000 km

The minimum velocity an object needs to leave the gravitational influence of a massive body, like Earth, and never return is called the?

• Binding Velocity

• Terminal Velocity

• Orbital Velocity

• Escape Velocity