Investigate: Measure 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?
This activity will guide you through the process of how to do this. Use Go Observing to get your image of a galaxies, and use AstroLab to measure the size for yourself.
By the end of this resource you will:
- Have used Go Observing to request an observation of a galaxy.
- Have used AstroLab software to open and analyse your image.
- Have measured the distance across the galaxy and converted the units to light years.
To complete this resource you will need:
- To watch the video above
- To watch the video on how to measure size using AstroLab.
- To make sure you are logged in to the website (and registered).
- A calculator (optional).
- Access to the internet (table or computer recommended).
- Internet browser.