Bob Berman

Tune in to hear about an upcoming vernal equinox! Many civilizations have made vernal equinoxes into special or even sacred days. Learn how the sun is shifting into new constellations, and what most people get wrong.

We’re now just past the new Moon stage of the lunar cycle, which means we are now seeing a crescent moon. Always lowish in the sky, the crescent may be the Moon’s most fascinating phase. Perhaps its dreaminess comes from its uniqueness. Tune in to hear about other shapes and the sky and the best time to view Venus.

The Apophis asteroid captured the public’s interest ever since it was discovered in 2004. It’s big enough to destroy a city and it’s headed our way. Lately, some social media posters seem to have discovered this menace for the first time and gave it scary publicity. Tune in to hear the actual facts. The asteroid will miss us this time.

The Northeast U.S. is now in its single season that’s cloudy and windy, which might remind us of worlds where no breeze has ever stirred, where dust lies flat for billions of years. That’s what the Apollo astronauts saw. Tune in to hear about the characteristics of the planets: Mercury, Earth, Venus and of course we’ll talk about the Moon.

So far this cold season, Earth's sister planet has heated up the evening sky like a UFO. You've surely seen that dazzling "star" soon after sunset: This has been its best showing since 2017. That eight-year interval is no accident. So happens, 13 of Venus’ years around the Sun have the same number of days as eight Earth years. They both work out to 2,922 days. Tune in to hear when you can see expect these special evenings.

What’s the weather typically like in February? We’ll also explore the history of the famous woodchuck, and what science actually backs Groundhog Day.

It's cold out in the Northeast. The rest of the world is using Celsius, but America is still using Fahrenheit. Tune in to hear how these calculations work.

We stick to Earth's surface without giving it a thought. Yet can anyone honestly explain gravity, the most far-reaching of nature’s four forces? Hear about the movement of the earth and Johannes Kepler's 400-year-old discovery.

The solstice marking the start of winter happened a couple of weeks ago, on December 21. But it also usually delivers a lot of confusion. Hear the real surprise about our earliest sunset and just how late the sun will set this month.

Do you want to understand climate change – really understand it – in under 3 minutes? Then pull up a chair. It all revolves around the trapping of heat, which is far simpler and more fascinating than people seem to believe.