How triangles measure cosmic distances
Trigonometry uses Earth's orbit as a baseline to measure tiny shifts in star positions, accurately calculating immense cosmic distances and mapping our galaxy.
Trigonometry, the math of triangles and angles, is essential for measuring the vast distances to stars. Astronomers use a method called stellar parallax, observing a star from opposite sides of Earth's orbit. This 300-million-kilometer baseline creates a tiny apparent shift in the star's position against background stars.
There's more to this story — open the app to keep reading.
Continue Reading in App
1 more paragraphs · plus a 4-question quiz