The 1st interstellar object – 1I/’Oumuamua – had already passed closest to our sun when astronomers first spotted it. So catching this 2nd one – 2I/Borisov – prior to perihelion was a big plus for astronomers! Before and after images here.

There’s a supermassive black hole – 4 million times our sun’s mass – in the center of our Milky Way galaxy. Astronomers who’ve measured star movements near this central black hole are now saying there might be a 2nd companion black hole near it.

How did the so-called tiger stripes – huge parallel cracks – form in the icy surface of Saturn’s moon Enceladus? A new study from the Carnegie Institution for Science provides some answers.

Astronomers have discovered a black hole with 40 billion solar masses in the heart of the Abell 85 cluster of galaxies.

The fascinating object 2I/Borisov has been steadily brightening as it nears its encounter with our sun. It’ll pass closest to the sun on December 8, 2019, then flee again toward interstellar space.

Remember comet 46P/Wirtanen? It was a bright comet about this time last year. Around the time it swept near the Earth and sun, the comet entered the field of view NASA’s TESS planet-hunter. And boom! It underwent an outburst, caught by TESS.

White dwarf stars are typically more or less Earth-sized. The planet orbiting white dwarf WDJ0914+1914 appears to be at least twice as big as its star! High intensity radiation from its star is causing this planet to evaporate. Will the same thing happen in our solar system someday?

We know of a couple of dozen so-called “stellar-mass” black holes in our Milky Way galaxy. They tend to be between about 5 and 20 times as heavy as our sun. This new black hole – in a distant spiral arm of the galaxy – is 70 times as heavy as the sun.

A new study focuses on the axial tilt of Earthlike exoplanets in binary or double star systems. It boosts hope for complex life elsewhere … although not, these astronomers say, within the star system closest to our sun.

It sounds unbelievable, but a new study from Kagoshima University and the National Astronomical Observatory of Japan says that exoplanets – thousands of them – could be orbiting supermassive black holes.

‘Oumuamua – the weird object that entered our solar system in 2017 and quickly fled back toward interstellar space – might not be an asteroid or comet from a distant solar system, as many believed. It might instead be a “cosmic dust bunny.”

New observations appear to confirm the existence of water vapor geysers on Europa. The findings are tantalizing, but some scientists are not convinced yet.

Space-based observatories detected a violent explosion in a galaxy billions of light-years away. It became the brightest source of high-energy cosmic gamma rays seen so far. Specialized Earth-based telescopes detected it via faster-than-light particles cascading through Earth’s atmosphere.