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Astronomy Essentials
Tonight
Visible planets and night sky guide for June
Visible planets and night sky guide. Today, look for a wonderful planetary trio: Venus, Jupiter and Mercury. Venus and Jupiter will reach conjunction soon!
June 1, 2026
Space
Could aliens visit Earth? Here are some challenges
Scientists say it’s unlikely aliens visit Earth anytime soon, because interstellar travel faces huge barriers of distance, energy and time.
May 31, 2026
Earth
Human World
BOOM over Massachusetts and U.S. East probably a meteor
Many reported a streak across the daytime sky and a boom over Massachusetts and surrounding areas in the US East, probably a meteor.
May 31, 2026
Astronomy Essentials
Can a single season have only 2 full moons?
We know it's possible to squeeze 4 full moons into a single season. But can a season have just 2 full moons? Turns out it can, but it is rare.
May 31, 2026
Tonight
Deneb is an incredibly distant star. But how do we know?
The star Deneb - part of the Summer Triangle - is one of the most distant stars you can see with your eye alone. But why don't we know its distance precisely?
May 31, 2026
Earth
How cities can change the weather during storms
Researchers looked at 22 years of data to discover how cities can change the weather. Certain storms intensify over cities, leading to more urban flooding.
May 31, 2026
Human World
Spaceflight
Blue Origin mega-rocket explodes on launch pad
Blue Origin experienced a setback late Thursday when its New Glenn mega-rocket exploded. The launch pad was also destroyed.
May 29, 2026
Brightest Stars
Arcturus, brightest star of the northern sky
Arcturus is the brightest star in the northern half of the sky. It's easy to find in spring in the Northern Hemisphere near the handle of the Big Dipper.
May 29, 2026
Human World
Space
The 1919 solar eclipse that proved Einstein right
During a May 29, 1919, solar eclipse, astronomers saw the sun bend starlight, proving Einstein's general relativity and catapulting him to rock star fame.
May 29, 2026
Earth
Strange sonic boom rattles South Carolina
People in South Carolina heard a strange sonic boom on May 28, 2026, around 5:30 p.m. The USGS said it wasn't an earthquake. Could it have been a meteor?
May 28, 2026
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