supernovae – Astronomy Now

Now you see it, now you don’t; a massive star disappears

2 July 2020 Astronomy Now

Astronomers ponder the fate of a massive star in a remote dwarf galaxy that disappeared without a trace.

Researchers build “supernova in a box” to study the physics of stellar blasts

23 June 2020 Astronomy Now

Researchers build a “supernova machine” to mimic in miniature the explosive turbulent mixing that occurs when stars explode.

Observations show shock waves likely key to nova’s brightness

15 April 2020 Astronomy Now

Observations indicate the visible brightness of a nova is driven by gamma ray emissions from shockwaves in the post-explosion environment.

A titanic burst of star formation in Milky Way’s recent past

17 December 2019 Astronomy Now

Peering into the heart of the Milky Way with a powerful infrared camera, astronomers see evidence for a titanic burst of star formation in the relatively recent past.

Face-on spiral galaxy showcases multiple supernova blasts

5 December 2019 Astronomy Now

Spiral galaxies oriented face on to Earth offer spectacular views while giving astronomers a better chance to monitor the frequency of supernova blasts. A prime example is a galaxy known as NGC 5468 where at least five stellar explosions have been spotted.

Astronomers thrilled by most powerful gamma ray burst to date

24 November 2019 Astronomy Now

Astronomers have spotted the most powerful gamma ray burst to date, a titanic explosion that emitted radiation a trillion times more energetic than visible light.

A supernova that may shed light on how the first stars died

18 August 2019 Astronomy Now

Astronomers find an apparent pair-instability supernova, a titanic blast that may shed light on how the first stars ended their lives in a metal-poor cosmos.

Hubble monitors galactic host of multiple supernova blasts

11 June 2019 Astronomy Now

Imaged by the Hubble Space Telescope, the active Seyfert galaxy NGC 4051 has hosted at least three supernovae since 1983 that were visible to ground- or space-based telescopes on Earth.

Astronomers debate an unprecedented “holy cow” outburst

13 January 2019 Astronomy Now

Astronomers are debating what triggered an explosion of light in a galaxy 200 million like years away that was 10 to 100 times brighter than a typical supernova.

Supernovae not needed for at least some heavy isotopes

31 December 2018 Astronomy Now

New research suggesgs low-mass stars can cook up heavy elements, helping explain the observed abundance of some heavy isotopes.