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APOD: 2025 October 7 Á SN Encore: A Second Supernova Seen Several Times
| << Yesterday | 7.10.2025 | Tomorrow >> |
Credit & Copyright: Webb (main):
NASA,
ESA,
CSA,
STScI,
J. Pierel
(STScI) &
A. Newman
(Carnegie Inst. for Science);
Hubble (rollover): NASA, ESA, STScI, S. A. Rodney (U. South Carolina) & G. Brammer (NBI, U. Copenhagen)
Explanation:
Now a second supernova in this same galaxy is repeating.
The cause is the
gravitational lens effect of a massive foreground
cluster of galaxies (MACS J0138) --
it creates multiple images of a perfectly aligned
background galaxy (MRG-M0138).
What's
particularly interesting is that this
background galaxy has young stars that keep blowing up.
And images of each
supernova
explosion keep coming to us multiple times through different paths through the cluster.
The original lensed supernova set, shown in the
rollover,
is called Requiem and was first seen by the
Hubble Space Telescope in 2016.
This second lensed supernova set is called
Encore and was first seen by the
Webb Space Telescope
in 2023.
More images from these supernovas are predicted to be
on the way, and exactly when they arrive should help
humanity to better understand the mass distribution of the galaxy cluster,
the supernovas themselves, and possibly even
the universe.
Hubble (rollover): NASA, ESA, STScI, S. A. Rodney (U. South Carolina) & G. Brammer (NBI, U. Copenhagen)
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NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day