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Strange rocky world found lurking on the edge of 'inside out' planetary system
Astronomers have spotted an unusual 'inside-out' planetary system where a rocky world seems to have formed far beyond the realm typically reserved for gas giants.
An ocean the size of the Arctic once covered half of Mars, new images hint
Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.
Jupiter will outshine every star in the sky this weekend — how to see the 'king of planets' at opposition
Jupiter reaches opposition on Jan. 10, when it will shine all night at its brightest as Earth moves between the giant planet and the sun.
Uranus and Neptune may be 'rock giants,' not 'ice giants,' new model of their cores suggests
A new computational model suggests that Uranus' and Neptune's cores may be less icy than their "ice giant" nickname suggests.
Why is Venus so bright?
The "morning star" is bright because of several factors, including having an atmosphere filled with sulfuric acid.
Mysterious, irradiated 'scar' in our galaxy may finally have an explanation
Astronomers traced a mysterious 'scar' of ionized gas around the solar system to two stars that had a close flyby with our sun millions of years ago.
Earth had a secret neighbor, and it may explain our moon
Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial rocks reveals.
How dangerous are interstellar objects like 3I/ATLAS?
Interstellar objects like 3I/ATLAS are most likely to enter our solar system from two specific directions, a new study suggests. What does it mean for Earth?
Odd-looking rock on Mars is totally alien to the Red Planet, Perseverance rover finds
NASA's Perseverance Mars rover recently came across an odd rock, dubbed "Phippsaksla," that is unlike anything else the robot has found on the Red Planet. It turns out that it probably isn't from our neighboring world and likely crashed on Mars instead.
