Distance
Measuring distances in astronomy is difficult but crucial. We need to know how far away objects are to look at the differences between them. Two objects can look different but be very similar, with one further away than the other. This can make them challenging to study.
- How do we measure distance?
Knowing the distance to objects in space is important. However, measuring it is also very hard—you can't just use a ruler! Astronomers have created a range of ways to measure the distance to objects in space.
Hunt the Asteroids
How do we find asteroids?
Distances in Space
Investigate the Size of a Galaxy
Have you ever wondered how big a galaxy is? They contain millions to billions of stars but what does that really mean for size?
Reading about sizes in a book is one thing, but what if you could make an observation of a galaxy and then measure its size?
Measure a Day on Jupiter
Measure the Speed of Light
Calculate the Speed of the Planets
Did you know the Earth is travelling around the Sun at nearly 107,000 kilometres per hour?
Walk the Solar System
Connecting with the natural world through topics like space and astronomy may help improve your mental health and wellbeing. Use our guide to take a mindful walk through the entire Solar System.