David L. Chandler, Author at Astronomy.com

Orbit of Comet C/2025 D1 (Gröller)

Astronomers have spotted the most distant comet ever discovered

Does Planet Nine exist?

Comet C/2024 S1 (ATLAS) on Oct. 11, 2024

How Comet ATLAS fizzled out

Now far from the Sun in the outer solar system, the strange interstellar object known as ‘Oumuamua is depicted here as it’s approached by a questing spacecraft. Project Lyra is hoping to launch such a craft to explore our first known visitor from another solar system and provide the detailed study scientists desperately seek.

Exotic Objects, Space Exploration

‘Oumuamua: Can we catch an interstellar interloper?

Hypothesized Planet Nine (artwork)

Does Planet Nine exist? The new evidence says yes.

Starlink satellite trails

Are internet satellites a threat to astronomy?

Alien Life, Science, Solar System

Are these seafloor particles the first ever from interstellar space?

Could the clouds of Venus support life?

ocean horizon

Have astronomers finally found a meteorite from outside the solar system?

Exotic Objects, Science

Did the brightest gamma-ray burst ever seen spawn a supernova?

Alien Life, Science, Solar System

Scanning Mars for microhabitats that could host microbial life

The new search for alien intelligence