In space, no one can hear you scream. This is because there is no air in space – it is a vacuum. Sound waves cannot travel through a vacuum.

Venus, not the closest to the sun, is the hottest planet in our solar system with an average temp of 450° C. Mercury lacks an atmosphere causing temp fluctuations.

NASA's space suit costs $12m, 70% is for the backpack and control module. The current suits were built in 1974 and would cost an estimated $150m today.

Did you know the Sun's mass is 99.86% of the solar system? It's mostly hydrogen & helium. If it had a voice, would it be high and squeaky from all the helium?

The Sun's volume is so huge that it could hold 1.3 million flattened Earths or 960,000 spherical Earths - that's a lot of Earths!

Earth has 3 trillion trees, while the Milky Way has 100-400 billion stars. That means more trees on Earth than stars in the galaxy!

Sunsets on Mars appear blue due to fine dust that enhances the blue part of the sky near the Sun. Normal daylight shows the planet's rusty color.

The universe contains 1,000,000,000,000,000,000,000,000 stars, while grains of sand on Earth are estimated to be seven quintillion, five hundred quadrillion grains. Big sand castle!

A day on Venus lasts 243 Earth days, while its year is only 225 Earth days! Slow rotation & orbit make it unique in the solar system.

A team of astrophysicists has estimated that an exoplanet twice the size of Earth is largely made up of diamond. The planet, 55 Cancri e, is located around 40 light years from Earth and has a mass eight times that of our planet.