Categories: AstronomyAstrophotos

This Is Fascinating. An Image of a Galaxy’s Magnetic Field

There’s always more than one way to look at the world.  There’s also more than one way to look at a galaxy.  And sometimes combining those ways of looking can result in something truly special.

That is what happened recently when a team of astronomers from seven different universities in four different countries used three different telescopes to produce an absolutely spectacular image of a galaxy and its surrounding magnetic field.

The galaxy in the image is NGC 4217, a spiral galaxy which can be seen edge on in the constellation Ursa Major.  It’s similar in shape to the Milky Way and about 67 million light years away.  It also has a very large magnetic field.

Image of the dust filaments of the NGC 4217 galaxy, taken by Hubble. Credit ESA/Hubble & NASA

That magnetic field expands to 22,500 light years away from the galaxy’s central disk.  However, scientists aren’t really sure what causes such large magnetic fields around entire galaxies.  They hope that images similar to the one recently composited will help solve that mystery.

The image of NGC 4217 and its magnetic field is a composite of images taken from 3 different telescopes.  Radio data were collected at the Very Large Array, as part of the EVLA survey, run by the National Radio Astronomy Observatory.  Images in the optical wavelength were collected as part of the Sloan Digital Sky Survey, while data on the hydrogen concentration (seen in red in the image) were collected at the Kitt Peak National Observatory.  Even with all that data collected, the magnetic field lines still had to be calculated by Yelena Stein of the Observatoire Astronomique de Strausbourg, in Strausbourg, France.

Image of the Very Large Array at work. Credit: Andrew Clegg, NSF

What all that data and calculations has produced is an absolutely stunning image. It proves the beauty in taking a different look at the world…or galaxy.

Andy Tomaswick

Recent Posts

Here’s How to Weigh Gigantic Filaments of Dark Matter

How do you weigh one of the largest objects in the entire universe? Very carefully,…

1 hour ago

How Could Astronauts Call for Help from the Moon?

Exploring the Moon poses significant risks, with its extreme environment and hazardous terrain presenting numerous…

13 hours ago

There Was a 15 Minute Warning Before Tonga Volcano Exploded

Volcanoes are not restricted to the land, there are many undersea versions. One such undersea…

14 hours ago

Main Sequence and White Dwarf Binaries are Hiding in Plain Sight

Some binary stars are unusual. They contain a main sequence star like our Sun, while…

15 hours ago

What a Misplaced Meteorite Told Us About Mars

11 million years ago, Mars was a frigid, dry, dead world, just like it is…

18 hours ago

Uranus is Getting Colder and Now We Know Why

Uranus is an oddball among the Solar System's planets. While most planets' axis of rotation…

21 hours ago