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Brightest Stars
Is Zubeneschamali a green star? Pros say no. Sky-watchers say yes.
Professional astronomers can explain to you why stars can’t look green. Yet many stargazers insist that Zubeneschamali proves otherwise.
June 28, 2026
Earth
H5N1 bird flu has now spread to all 7 continents
The H5N1 bird flu has reached Australia, completing its spread to all 7 continents and raising concerns for the nation’s birds, wildlife and livestock.
June 28, 2026
Space
Why do stars twinkle, but planets don’t?
Seen from space, both stars and planets shine steadily, but seen from Earth, stars twinkle while planets (usually) do not. Here’s why.
June 28, 2026
Sun
Sun news: CME incoming, G1–G2 storms possible June 30
Sun news for June 28, 2026: CME from June 26 targets Earth! G1–G2 storms possible June 30. AR4478 beta-gamma-delta growing. Aurora alert midweek!
June 28, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for June and July
EarthSky's visible planets and night sky guide. The moon hangs near bright red Antares tonight. And watch a video here about the June full moon.
June 27, 2026
Today's Image
See Milky Way’s core in most detailed photo yet
ESA released a new image of the Milky Way's core. This view, from the Euclid space telescope, is the largest and most detailed image yet of the galactic center.
June 26, 2026
Human World
Space
Asteroid Day to be observed worldwide on June 30
The annual Asteroid Day program is in Luxembourg on June 26 and 27, 2026. That's ahead of the internationally recognized Asteroid Day June 30.
June 26, 2026
Space
Voyager 1 to reach 1 light-day from Earth on November 18
NASA said on June 17, 2026, that Voyager 1 will reach 1 light-day from Earth soon. It estimates the spacecraft will reach that mark on November 18, 2026.
June 26, 2026
Brightest Stars
Massive ruby red Antares is the Scorpion’s Heart
Red Antares, Heart of the Scorpion in the constellation Scorpius, is a massive red supergiant star in the last stages of its lifespan.
June 26, 2026
Astronomy Essentials
Latest sunsets follow the summer solstice
Why don't the latest sunsets come on the longest day (the solstice)? It's all to do with a discrepancy between sun time and clock time.
June 26, 2026
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