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Mon Sep 23, 2019, 02:07 AM

This Is What The Milky Way's Magnetic Field Looks Like

Sep 23, 2019, 02:00am
Ethan Siegel Senior Contributor



The dust in the Milky Way, shown in darker and redder colors, are regions where new star formation is taking place. These dusty regions are correlated with the magnetic fields present in our galaxy, and the background light gets polarized in a measurable way as a result. ESA/PLANCK COLLABORATION. ACKNOWLEDGMENT: M.-A. MIVILLE-DESCHÊNES, CNRS – INSTITUT D’ASTROPHYSIQUE SPATIALE, UNIVERSITÉ PARIS-XI, ORSAY, FRANCE

The Milky Way, to human eyes, appears as simply a mix of stars and light-blocking dust.



A map of star density in the Milky Way and surrounding sky, clearly showing the Milky Way, the Large and Small Magellanic Clouds (our two largest satellite galaxies), and if you look more closely, NGC 104 to the left of the SMC, NGC 6205 slightly above and to the left of the galactic core, and NGC 7078 slightly below. In visible light, only starlight and the presence of light-blocking dust is revealed, but other wavelengths have the capacity to reveal fascinating and informative structures far beyond what the optical part of the spectrum can. ESA/GAIA

However, a glimpse in additional wavelengths reveals enormously rich, detailed structures.



This ultra-detailed view of the Milky Way spans many different wavelengths of light, and as such it can reveal gas, charged particles, many types of dust, and many other signals that appear in the microwave and millimeter wavelength ranges. The Planck satellite provides us with our best all-sky view of the cosmos in this wavelength range. ESA/NASA/JPL-CALTECH

Observations show galactic foreground signals combined with cosmic signals originating way back from the Big Bang.

More:
https://www.forbes.com/sites/startswithabang/2019/09/23/this-is-what-the-milky-ways-magnetic-field-looks-like/#bdb3c4d50379

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Arrow 13 replies Author Time Post
Reply This Is What The Milky Way's Magnetic Field Looks Like (Original post)
Judi Lynn Sep 23 OP
Kablooie Sep 23 #1
Control-Z Sep 23 #3
Crabby Appleton Sep 23 #5
eppur_se_muova Sep 23 #8
LudwigPastorius Sep 23 #9
tblue37 Sep 23 #2
calimary Sep 23 #4
N_E_1 for Tennis Sep 23 #6
DemocracyMouse Sep 23 #7
Karadeniz Sep 23 #10
flibbitygiblets Sep 26 #13
AllaN01Bear Sep 24 #11
Nitram Sep 24 #12

Response to Judi Lynn (Original post)

Mon Sep 23, 2019, 02:17 AM

1. So *that's* what Van Gogh's been working on since he died.

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Response to Kablooie (Reply #1)

Mon Sep 23, 2019, 03:03 AM

3. I thought something along the same lines.

Less witty but definitely "Van Gogh".

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Response to Control-Z (Reply #3)

Mon Sep 23, 2019, 04:53 AM

5. Me too!

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Response to Kablooie (Reply #1)

Mon Sep 23, 2019, 09:17 AM

8. "Starry Night" -- the extended version. nt

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Response to eppur_se_muova (Reply #8)

Mon Sep 23, 2019, 10:26 AM

9. Ja!

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Response to Judi Lynn (Original post)

Mon Sep 23, 2019, 02:21 AM

2. K&R. nt

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Response to Judi Lynn (Original post)

Mon Sep 23, 2019, 04:47 AM

4. Beautiful!

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Response to Judi Lynn (Original post)

Mon Sep 23, 2019, 05:04 AM

6. Looks like an Edvard Munch background to me...nt

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Response to Judi Lynn (Original post)

Mon Sep 23, 2019, 06:39 AM

7. Sacred.

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Response to Judi Lynn (Original post)

Mon Sep 23, 2019, 01:06 PM

10. If the top image had been a painting, I'd have bought it!

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Response to Karadeniz (Reply #10)

Thu Sep 26, 2019, 03:18 PM

13. Was thinking similarly: I want a framed print!

Talk about a cool conversation piece!

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Response to Judi Lynn (Original post)

Tue Sep 24, 2019, 11:04 PM

12. Thanks!

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