Waves
We are all familiar with waves; from ripples on the surface of a pond to the swell of the ocean. A wave is just a regular vibration that travels through something, like air or water.
Unlike sound, light waves can travel through nothing, like the vacuum of space. This means that the light coming from stars, and all other objects in space is able to reach us here on Earth.
Gravitational Waves
Gravitational waves are tiny, invisible ripples in space. They travel for huge distances at the speed of light. The waves squeeze and stretch any objects they pass, but only by a tiny amount.
- Evidence for Gravitational Waves
On 14th September 2015, scientists announced they had the first evidence for gravitational waves. This was nearly 100 years after Einstein published his work.
Measure the Speed of Light
Make Your Own Spectroscope
Spectroscopy involves splitting light into its different wavelengths. Each chemical element emits or absorbs a unique spectrum&n
Telescopes Quiz
Telescopes are used to magnify distant objects. They are a vital tool for astronomy. Over the last few hundred years, scientists and engineers have built bigger and better telescopes, revealing the mysteries of the Universe. But how much do you know about telescopes on Earth and beyond?