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Space
A passing star may have unleashed a comet deluge
Scientists think a passing star 2.5 million years ago might have sent a wave of comets in toward the sun. Some of those comets could still be arriving today.
June 30, 2026
Earth
Extreme heat impacting millions across eastern half of US
A dangerous, extreme heat wave is forecast for the Midwest and East Coast of the United States this week into the holiday weekend. Get the details here.
June 30, 2026
Sun
Sun news: Two M flares, three potent sunspot regions!
Sun news for June 30, 2026: The sun blasted 2 M (moderate) flares over the past day. And more action could be on the way, with 3 sunspot regions showing the strongest possible magnetic configuration.
June 30, 2026
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
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
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.
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
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
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