The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

A comet tearing through the inner solar system at roughly 58 kilometers per second formed between 10 and 12 billion years ago ...

Gravity, electromagnetism, the strong nuclear force, the weak nuclear force. For decades, physicists have recognized exactly ...

Thanks to the sheer mass of Jupiter and fellow gas giant Saturn, the Solar System barycenter is rarely in the center of the ...

The study says that large cosmological surveys like Euclid and DESI can provide hints of new physics by looking at billions ...

Rather than slowly condensing over millions of years, the first building blocks of Earth and other planets may have formed ...

The sun is an incomprehensibly gigantic, constantly roiling nuclear furnace—but some days are even busier than others. Based ...

Our solar system is a smashing success. A new study suggests that from its earliest period — even before the last of its nebular gas had been consumed — Earth’s solar system and its planets looked ...

The LHS 1903 system defies expectations with a rocky outer planet, prompting new ideas about how planets form and evolve.