Welcome to StarDate

Home of America’s longest-running national daily astronomy radio feature.
And so much more.

Stardate:

June 11, 2026

Radio: Today’s Episode

Premium Same-Day Audio Access lets you stream episodes of StarDate the same day they air.
Log in or subscribe now to listen!

Radio: Yesterday’s Episode

Stargazing

  • Evening Array

    The planets Venus, Jupiter, and Mercury, and the stars Pollux and Castor-the “twins” of Gemini-congregate in the west in early evening. Venus is the brightest member, with the twins to its right, and Jupiter and Mercury to its lower right.


  • Eltanin

    Eltanin, an Arabic name that means “the serpent,” is the brightest star of Draco, the dragon, which is high in the north on summer evenings. Eltanin is as bright as the nearby North Star, Polaris.


  • Moon and Saturn

    The planet Saturn is near the Moon at dawn tomorrow. It looks like a bright star to the lower right of the Moon. A small telescope will reveal the largest of the planet’s almost 300 known moons.


Moon Phases

At the new Moon phase, the Moon is so close to the Sun in the sky that none of the side facing Earth is illuminated (position 1 in illustration). In other words, the Moon is between Earth and Sun. At first quarter, the half-lit Moon is highest in the sky at sunset, then sets about six hours later (3). At full Moon, the Moon is behind Earth in space with respect to the Sun. As the Sun sets, the Moon rises with the side that faces Earth fully exposed to sunlight (5).

Today’s Sponsor

Stardate Magazine

Current Issue: MAY/JUNE 2026

A Match Made in the Cosmos

by Olivia Castillo

We’ll tell you how scientists at the University of Texas are using artificial intelligence to study the stars. And we’ll explain how one long-distance explorer is finding its way beyond the realm of the planets.

Explore

Fun Factoid

Star Teachers

  • Stars and Galaxies

    Galaxies contain billions of stars. Do galaxies collide? Do the stars within them collide?

Shopping Cart
Scroll to Top