The "unexpected finding" of nickel gas around interstellar comet 21/Borisov lines up with "astonishing" new observations of local comets, scientists say.
Voyager 1 has likely made the first continuous measurement of the density of matter in interstellar space.
Most scientists think the first interstellar visitor to our solar system has a natural explanation. Harvard professor Avi Loeb makes the case for an alien origin.
Amir Siraj, a student studying astrophysics at Harvard University, talks about the potential spread of life throughout the Milky Way in a VICE News interview.
ʻOumuamua, the first interstellar object discovered in our solar system, was whittled into its elongated shape by stellar tides, scientists say.
First, scientists found stardust crystals dating back seven billion years. Just weeks later, another team has reported finding more “presolar” compounds in an unexpected place.
“That’s the new result of the paper: What exactly is possible if you have a Dyson sphere and you want to use it to drive a jet to push a star around?”
Voyager 2 passed through the borderland between the Sun and interstellar space and found something new and puzzling that Voyager 1 missed.
Unlike ʻOumuamua, the first interstellar object ever detected, comet 2I/Borisov is radiant and gassy.
While an alien explanation for 'Omuamua can't be ruled out, a new study concludes it is more likely natural in origin.
“If we can’t build something capable of delivering astronomical levels of energy, perhaps we could instead steal the energy from an astronomical object.”