How big is our Sun compared to other stars? In dramatic and popular videos featured on YouTube, the relative sizes of planets, stars, and even the universe are shown from […]

To some, it may look like a cat’s eye. The alluring Cat’s Eye nebula, however, lies three thousand light-years from Earth across interstellar space. A classic planetary nebula, the Cat’s […]

Mars shines brightly now in planet Earth’s sky. Seen with a yellowish hue it rises over the hills and far away in this serene night skyscape, a countryside panorama recorded […]

Mars shines brightly now in planet Earth’s sky. Seen with a yellowish hue it rises over the hills and far away in this serene night skyscape, a countryside panorama recorded […]

NASA’s Fermi Gamma-ray Space Telescope was launched into orbit on June 11th, 2008. Its instruments detect gamma-rays — light that is thousands to hundreds of billions of times more energetic […]

Marked by an unusually bright central region, swirling dust lanes, and far flung tidal tails, peculiar NGC 3256 is the aftermath of a truly cosmic collision. The 500 million year […]

How complex is Jupiter? NASA’s Juno mission to Jupiter is finding the Jovian giant to be more complicated than expected. Jupiter’s magnetic field has been discovered to be much different […]

These people are not in danger. What is coming down from the left is just the Moon, far in the distance. Luna appears so large here because she is being […]

Volcanic activity on the Big Island of Hawaii has increased since this Hawaiian night skyscape was recorded earlier this year. Recent vents and lava flows are about 30 kilometers to […]

Since the distance from Earth to Mars changes drastically as the planets orbit the Sun, Mars’ appearance changes dramaticaly. Mars is bright now, and it’s getting closer and brighter still […]