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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: Action on sun’s far side over the past day
Sun news for June 27, 2026: Far-side prominences erupt as AR4478 builds potential. M-flare odds 50%, X-flare 10%. G1 storm possible June 28. Stay tuned!
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
Space
NASA to save Swift spacecraft from plunging back to Earth
The Swift spacecraft is rapidly falling back to Earth. But NASA has a plan to boost the telescope back into orbit, beginning this week.
June 25, 2026
Earth
Back-to-back Venezuela earthquakes kill at least 164
Two back-to-back Venezuela earthquakes caused devastation last night. The current death toll is at least 164, with over 700 injured.
June 25, 2026
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