ALMA observes a giant sunspot (3 millimetres)

This ALMA image of an enormous sunspot was taken at a wavelength of 3 millimetres. Sunspots are transient features that occur in regions where the Sun’s magnetic field is extremely concentrated and powerful. They have lower temperatures than their surrounding regions, which is why they appear relatively dark.

These observations are the first ever made of the Sun with a facility where ESO is a partner. They are an important expansion of the range of observations that can be used to probe the mysterious physics of our nearest star.

Credit:

ALMA (ESO/NAOJ/NRAO)

About the Image

Id:eso1703b
Type:Planetary
Release date:17 January 2017, 15:00
Related releases:eso1703
Size:2100 x 2100 px

About the Object

Name:Sun, Sun spot
Type:Solar System : Star : Feature : Photosphere : Sunspot
Category:Solar System

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Colours & filters

BandWavelengthTelescope
Millimeter3.0 mmAtacama Large Millimeter/submillimeter Array
Band 3

 

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