NightSky
Summer Triangle Corner: Altair
Summer Triangle Corner: Altair Altair is the last star to rise for Northern Hemisphere observers before summer begins, appearing high overhead at sunset in September. Altair is a rapidly spinning star that appears “squished” due to its rapid rotation, which was first detected in the 1960s and confirmed through interferometry observations. The star’s equatorial dimming […]
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Light pollution is encroaching on observatories around the globe – making it harder for astronomers to study the cosmos
Light pollution is encroaching on observatories around the globe – making it harder for astronomers to study the cosmos Light pollution from human activity is encroaching on observatories around the world, making it harder for astronomers to study the cosmos. The rate of human-produced light in the night sky is increasing by as much as […]
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What’s Up: July 2025 Skywatching Tips from NASA
What’s Up: July 2025 Skywatching Tips from NASA Mars will be visible in the evening sky for most of July, joined briefly by Mercury, and will appear as a dimmer star each day. Venus will shine brightly in the east during the couple of hours before sunrise, making it a great morning sight, and will […]
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