Posts by 

Don Machholz

Raining fish and frogs … for real

Click here to read many recent, documented accounts of raining fish and frogs. Yes, it's a real thing! Discover the causes here.

Visualize the Perseid meteor stream in space

This visualization by Ian Webster and Peter Jenniskens uses NASA data to render the Perseid meteor stream in space. Don't miss this!

Delta Aquariid meteor shower: All you need to know in 2022

The nominal peak of the Delta Aquariid meteor shower is late July. But the shower rambles along steadily for weeks.

Why do meteor showers have a radiant point?

Meteors enter Earth's atmosphere on parallel paths. So, you'll see meteors appear to come from a single point in the sky: the radiant point!

Meet Delta Scorpii, aka Dschubba

Delta Scorpii, also known as Dschubba, is a variable star in the constellation Scorpius. With the eyes alone, you can check its brightness for yourself, and for science.

Shoemaker-Levy 9 impact on Jupiter 28 years ago

Comet Shoemaker-Levy 9 hit Jupiter in 1994, 28 years ago, scarring the gaseous surface and also leaving behind water that remains in the atmosphere today.

Eltanin and Rastaban, the Dragon’s eyes

These 2 famous stars shine down from the northern sky. Eltanin and Rastaban represent the fiery eyes of the constellation Draco the Dragon.

Ruby red Antares is the Scorpion’s Heart

Red Antares, Heart of the Scorpion in the constellation Scorpius, is a mighty star, a red supergiant in the last stages of its life span.

Does the North Star ever move?

The North Star is a symbol for constancy. But, if you took its picture, you'd find that it makes its own little circle around the sky's north pole every day.

Big and Little Dippers on June evenings

How can you see both the Big and Little Dippers? On June evenings, the Big Dipper is high in the north. Let it be your guide to the Little Dipper.