How big can they get? What's the largest so far detected? Where does an 18 billion solar mass black hole hide? We've never seen them directly, yet we know they are there. Lurking within dense star clusters or wandering the dust lanes of the galaxy. Where they prey on stars. Or swallow planets whole....

Observations of the orbits of six small objects have led researchers to propose a very large 9th planet--100s of astronomical units (AU) away from the sun. Far enough away that this Neptune-sized planet takes ~15,000 years to complete one orbit.

While filming coral off the Solomon Islands, David Gruber, a National Geographic Emerging Explorer, encountered a "bright red-and-green spaceship." This underwater UFO turned out to be a hawksbill sea turtle, which is significant because it's the first time that biofluorescence has ever been seen in...

New Horizons is the first mission to the Kuiper Belt, a gigantic zone of icy bodies and mysterious small objects orbiting beyond Neptune. This region also is known as the “third” zone of our solar system, beyond the inner rocky planets and outer gas giants. Johns Hopkins University Applied Physics L

Behold The Future...smartflower POP – the world’s first all-in-one solar system. Thanks to its extraordinary construction and the perfectly synchronised components, the system delivers, on an average, approx. 4,000 kWh per year, thus fulfilling the complete average electricity requirement of a house

Some lucky early risers in parts of the northern hemisphere were met with a halo like sunrise early onJune 10, 2021. The annular solar eclipse, also known as a ‘ring of fire’ eclipse, happens when the moon moves between the earth and the sun.

Scientists say there's a place in our solar system outside of Earth that has the chemical make-up to potentially support life. Researchers found that Saturn's sixth largest moon -- Enceladus -- has an ocean that contains phosphorus, which is found in human teeth, bones and DNA. CBS News space consu...

Photographer Mattias Klum experiences a face-to-face encounter with a lioness... a little too close for comfort.

Humans have been obsessed with eclipses for centuries. But, what can they actually teach us about our place in the solar system? Total solar eclipses have helped bring about some of the most important astronomic discoveries. Nicolaus Copernicus’ eclipse observations helped him determine that the Ear

2017 National Geographic Nature Photographer of the Year Contest.