You can tell spring has officially begun in the Northern Hemisphere just by looking at the stars. Here's how to easily spot the Spring Triangle without a telescope.

This large, nearly equilateral triangle is composed of three of the ... On Feb. 24, Mars will arrive at its second stationary point in its retrograde loop and will begin turning around and ...

You can tell spring has officially begun in the Northern Hemisphere just by looking at the stars. Here's how to easily spot ...

Image caption, STEP 2: Place the compass at the point where the two arcs meet ... the line to the dot – you now have a regular equilateral triangle.

These are set up in an equilateral triangle arrangement ... passing through it to focus on a point in space above the whole contraption. To make the display interactive, [Mac] used a trio of ...