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Astronomy Essentials
Earth farthest from sun – at aphelion – July 6, 2026
Earth farthest from sun - aka aphelion - on July 6. That's despite the fact that it's summer in the Northern Hemisphere.
July 1, 2026
Sun
Sun news: X flare! Sun-stuff speeding to Earth?
Sun news for July 1, 2026: X1.1 flare erupts from AR4479! This huge flare seems to have sent a blast of sun-stuff toward Earth.
Space
Rubin Observatory begins 10-year timelapse of the universe
The Rubin Observatory has now begun its Legacy Survey of Space and Time. This 10-year survey will create a timelapse record of the universe.
July 1, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for July
EarthSky's visible planets and night sky guide. Earth will soon be at its farthest from the sun. But it's hot summer. How can this be? Join today's livestream.
July 1, 2026
Astronomy Essentials
Brightest Stars
Epsilon Lyrae is the famous Double Double star
To the unaided eye, Epsilon Lyrae appears as 1 star. But it’s actually a system with at least 5 stars. Learn how to find them here.
July 1, 2026
Human World
July birthstone: The rare and precious ruby
The July birthstone is the ruby, one of the most prized precious stones. It is also one of the hardest gemstones, and is chemically related to the sapphire.
July 1, 2026
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
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.
June 30, 2026
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