The Rhythm of the Spheres

Reading the Night Sky

Wandering in Astronomy

The night sky is the oldest pattern of man, and every culture reads it differently. The stars above keep silent time, moving to a rhythm we are just now beginning to understand. Astronomy is where math, science, art, music, and words meet in a wondrous collision. In this section of our site, learn the basics of astronomy: from how a star chart is made, to projections and art that map the night sky, to how an astrolabe works just like it did thousands of years ago. Watch the North Star shift across centuries, explore how one sky has been mapped by many traditions, read what happened on this day in space, and see tonight’s moon for your location.

Map the Stars

The math behind star charts, with a projection explorer and a working astrolabe.

The Moving Sky

How the sky shifts across centuries, with a precession clock you can run.

The Traditions

One sky reads many ways, with a same-sky overlay of the world’s constellations.

This Day in the Stars

The sky’s events, discoveries, and lore tied to today’s date.

The Moon Tonight

Its phase and face, drawn live for where you’re standing.

โœฆ  Astronomy Picture of the Day  โœฆ

Strawberry Supermoon Over Devil's Saddle

July 4, 2022
Credit: Lorenzo Busilacchi
See this entry on NASA's APOD โ†’
Near the horizon the full moon often seems to loom large, swollen in appearance by the famous Moon illusion . But time-lapse image sequences demonstrate that the Moon's angular size doesn't really change as it rises or sets. Its color does, though. Recording a frame about every 60 seconds, this image also shows how red the Sun can look while low on the horizon. The featured montage was taken from Cagliari , Sardinia , Italy , the day after June's Strawberry Moon, a full moon dubbed a supermoon due to its slightly larger-than-usual angular size. This Strawberry Supermoon is seen rising behind the Devil's Saddle , a mountain named for the unusual moon-sized dip seen just to the right of the rising moon . A shrinking line-of-sight through planet Earth's dense and dusty atmosphere shifted the moonlight from strawberry red through honey-colored and paler yellowish hues. That change seems appropriate for a northern June Full Moon also known as the Strawberry or Honey Moon . A Thunder Supermoon -- the third of four supermoons in 2022 -- will occur later this month.

Today's Adventure Link: Click on โ€œCagliariโ€

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โœฆ  EarthSky  ยท  Astronomy.com  ยท  Phys.org  โœฆ
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