The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. This ancient stellar ...

Astronomy is a discipline pursued at a distance. And yet, actually measuring that last word—distance—can be incredibly tricky, even if we set our sights as nearby as the Moon. But now astronomers from ...

It’s a bit mind-bending to realise that everything we know about the scale of the universe comes from people stuck on a tiny rock, peering through glass at dots of light. We can’t exactly pull out a ...

If you’ve made a robot or played around with electronics before, you might have used a time-of-flight laser distance sensor before. More modern ones detect not just the first reflection, but analyze ...

To draw constructions you need a pencil, ruler and a pair of compasses. Loci are used to identify areas that satisfy criteria such as a given distance from a point or halfway between two lines.

Revise the different types of angles and rules for calculating angles. This guide includes interactive activities and a quiz. NEW: Angles in parallel lines Revise alternate, correspondent or ...