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May 25, 2024

Radio: Today’s Episode

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Radio: Yesterday’s Episode


  • Cor Caroli

    Cor Caroli, the brightest star of Canes Venatici, the hunting dogs, is in good view on spring evenings. It’s almost directly overhead at nightfall, above the curve of the Big Dipper’s handle. Its name means “Heart of Charles,” in honor of England’s King Charles II.

  • The Bear

    Ursa Major may be the most famous constellation that isn’t well known. Most of us know it for a pattern formed by only some of its stars: the Big Dipper. But few know that the dipper’s bowl forms the body of a bear, while its handle is the bear’s tail.

  • Moon and Antares

    The Moon appears to almost touch the bright star Antares tonight. Antares represents the heart of the scorpion. It is one of the largest, brightest, and most massive stars in our region of the Milky Way Galaxy.

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).

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