News – Page 25 – Astronomy Now

Shotgun-like meteoroid impacts and thermal stress trigger asteroid ejections

9 September 2020 Astronomy Now

Small rocks seen spewing into space from the asteroid Bennu likely were ejected due to thermal stress and shotgun-like meteoroid impacts.

Survey finds no detectable alien radio signals across 10 million stars

8 September 2020 Astronomy Now

Australian researchers find no detectable alien radio emissions across at least 10 million stars

Chandra shows off multiwavelength “treasure chest of cosmic delights”

7 September 2020 Astronomy Now

Multiwavelength astronomy offers a fresh look at familiar and unfamiliar targets alike.

Triple star system features mis-aligned planet-forming dust rings

4 September 2020 Astronomy Now

A star system in Orion features a warped protoplanetary disc that could indicate the presence of an unseen planet – a first for a triple star system.

Gravitational wave observatories detect biggest black hole merger yet

2 September 2020 Astronomy Now

Gravity waves indicate the birth of an elusive intermediate-mass black hole, raising fresh questions about the gap between stellar and supermassive black holes.

Astronomers find dual quasars are exceedingly rare

1 September 2020 Astronomy Now

While galaxy collisions and mergers are not rare, merging supermassive black holes at the hearts of active galaxies are far less common.

Gemini North captures mesmerising view of Comet NEOWISE’s rotation

25 August 2020 Astronomy Now

Researchers using the Gemini North telescope in Hawaii observe a spiralling outflow of gas from Comet NEOWISE, revealing its rotation.

Nearby supernova blasts may be culprits in at least one mass extinction

24 August 2020 Astronomy Now

Nearby supernovae may be to blame for an extended depletion of Earth’s protective ozone layer at the end of the Devonian period, triggering a mass extinction

Researchers find gas cloud pulsing in synch with distant microquasar

21 August 2020 Astronomy Now

Researchers find otherwise inconspicuous gas cloud pulsing in harmony with a distant black hole, suggesting a direct connection.

Debris in Kepler supernova remnant clocked at 23 million mph

19 August 2020 Astronomy Now

Debris in supernova remnant still moving at more than 20 million mph 400 years after Type 1a explosion.