Comets and asteroids

1 Dec 00:00 AEDT (30 Nov, 13:00 UT) 15 Dec 23:00 AEDT (12:00 UT) 31 Dec 22:00 AEDT (11:00 UT) The chart accurately matches the sky on the dates and times shown for Sydney, Australia. The sky is differ

Astronomers are now regularly detecting planets thousands of light years from Earth – but have we missed one in our own Solar System?

The comet dubbed 3I/ATLAS, a rare extrasolar intruder, continues to barrel through the Solar System, attracting interest and speculation from astronomers and space scientists worldwide. Harvard astron

For the week 2 December with Natalie Tambini

An artist’s impression of Cha 1107-7626 accreting material ...

If you thought 2025 was a roller coaster, wait until 2026 gets started. Uranus, Neptune and Pluto are aligned taking us into a new era. Earthquakes may change the shape of parts of the world, while se