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May 23, 2018
Spiral Galaxy NGC 4038 in Collision
Image Credit & Copyright: Astronomy Picture of the Day -- http://apod.nasa.gov/apod/astropix.html
Courtesy of http://apod.nasa.gov/apod/astropix.html
Spiral Galaxy NGC 4038 in Collision
Image Credit & Copyright: Astronomy Picture of the Day -- http://apod.nasa.gov/apod/astropix.html
Courtesy of http://apod.nasa.gov/apod/astropix.html
This galaxy is having a bad millennium.
In fact, the past 100 million years haven't been so good,
and probably the next billion or so will be quite tumultuous.
Visible toward the lower right, NGC 4038 used to be a normal spiral galaxy, minding its own business, until NGC 4039, to its upper left,
crashed into it.
The evolving wreckage, known famously as
the Antennae, is featured here.
As gravity restructures each galaxy, clouds of gas slam into each other,
bright blue knots of stars form, massive stars form and
explode,
and brown filaments of dust are strewn about.
Eventually the
two galaxies
will converge into one larger spiral galaxy.
Such collisions are not unusual, and even our own
Milky Way Galaxy
has undergone several in the past and is
predicted to collide
with our neighboring
Andromeda Galaxy in a few billion years.
The
frames that compose this image were taken by the orbiting
Hubble Space Telescope by professional astronomers to
better understand galaxy collisions.
These frames -- and many other deep space images from
Hubble -- have since been
made public,
allowing interested amateurs to download and
process them into, for example, this visually stunning composite.
