Earth’s Gravitational Field - The Potsdam Gravity Potato High areas on this map, colored red, indicate areas where gravity is slightly stronger than usual, while in blue areas gravity is slightly weaker.
What would it look like if Earth had rings like Saturn? These illustrations by Ron Miller show what our skies would look like if we had rings that were the same proportional size and position as Saturn's.
The Strait of Gibraltar, pinned FROM SPACE by astronaut Karen Nyberg! Europe and Africa are separated by only miles at the Strait of Gibraltar, which connects the Atlantic Ocean to the Mediterranean Sea.
Three thousand light-years away, a dying star throws off shells of glowing gas. This image from the Hubble Space Telescope reveals the Cat's Eye Nebula to be one of the most complex planetary nebulae known.
On April 11 the Sun gave up its strongest solar flare so far in accompanied by a coronal mass ejection (CME) headed toward planet Earth. A false-color composite image in extreme ultraviolet light from the Solar Dynamics Observatory captures the moment.
Tomorrow, a full moon will occur that appears slightly larger and brighter than usual. The reason is that the Moon's fully illuminated phase occurs within a short time from perigee - when the Moon is its closest to the Earth in its elliptical orbit.