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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. What's the truth?
June 30, 2026
Earth
Space
The Tunguska explosion rocked Siberia 118 years ago
The Tunguska explosion on June 30, 1908, is the largest asteroid impact in recorded history. Researchers are preparing for future Tunguska-sized events.
Astronomy Essentials
Tonight
Visible planets and night sky guide for July
EarthSky's visible planets and night sky guide. The moon is waning now and rising later each evening. Here are some planets and stars you can see.
June 30, 2026
Earth
The boat-billed heron: When nature thinks big
With its oversized bill and large eyes, the boat-billed heron is a striking example of evolution going big. Read about it here!
June 29, 2026
Tonight
June full moon – Strawberry Moon – is the lowest (highest) of the year
The June full moon - the Strawberry Moon - occurs on the overnight of June 29, 2026, and it will lie in the constellation Sagittarius. And it's a micromoon.
June 29, 2026
Sun
Sun news: Two M-flares and three complex sunspot regions!
Sun news for June 30, 2026: Two M-flares fire! Three regions hit beta-gamma-delta. G1–G2 storm watch tonight. Aurora may reach Seattle and Edinburgh!
June 29, 2026
Space
Large asteroid safely passed Earth on June 27
On June 27, 2026, a large asteroid safely passed close to Earth. Observers with small telescopes watched the asteroid sail by.
June 28, 2026
Space
A lunar quarantine facility to protect from alien microbes?
Scientists are proposing a lunar quarantine facility on the moon to protect Earth from possible alien microbes. Do we need one?
June 28, 2026
Space
Will Earth survive the red giant sun? New research suggests yes
Will Earth survive the sun's death, when our star becomes a red giant 5 billion years from now? A new study suggests it might, and maybe Mars too.
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
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