View a brilliant morning star, enjoy dark skies during New Moon, and take in plenty of deep-sky targets in the sky this week.

Io, the innermost of Jupiter’s four Galilean moons, is the most volcanic world in the solar system, giving it a dynamic mix of yellows, reds, and browns. Hyperion is one of the strangest moons ...

Over at Jupiter, observers with a telescope can catch a transit of the Galilean moon Io along with its shadow. How much and what you will see depends on your location. Io begins to cross the ...

For example, think of the Earth and the moon. We tend to assume that the latter orbits the former, but that’s not actually true. The Earth pulls at the moon, but the moon also pulls at the Earth ...

The small pinpoints of light are the four largest moons of Jupiter, called the Galilean moons. The crescent Moon pairs with Jupiter on April 2 and again on April 30. Mars starts the month in the ...

Juno arrived at Jupiter in 2016 and has made over 60 orbits of the giant planet, but for the past few years it has been edging closer and making fly-bys of the large Galilean moons. On Dec. 30, 2023 ...

Europa is being visited by NASA's Europa Clipper to examine its subsurface ocean while NASA's Juno continues to study Europa and the other Galilean moons. For Titan, NASA is slated to launch its ...

The moon dims, the meteors fly ... one of the two points in its orbit where it is farthest from the sun. Since Mercury orbits so close to the sun, it’s often drowned out by sunlight—and ...

Tianwen-4 is scheduled to launch around 2029 and head to Jupiter and eventually enter orbit around the Galilean moon Callisto. Next, a “ground simulation device for planetary habitable ...

open image in gallery Artist’s illustration of asteroid 2024 YR4 as it flies by the Earth and heads toward potential impact with the Moon (NOIRLab ... bodies in crossing orbits, the researchers ...

The innermost moon, Phobos, has lots of craters and is roughly 13.8 miles (22.2 km) in diameter. In about 50 million years, it is expected to break up or crash into Mars. Deimos orbits 2.5 times ...