2021 First-Class Forever Stamp,Sun Science: Coronal Loops

# 5599 - 2021 First-Class Forever Stamp - Sun Science: Coronal Loops

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US #5599
2021 Coronal Loops – Sun Science

  • Pictures coronal loops on our sun
  • One of 10 stamps in the Sun Science set


Stamp Category: 
Commemorative
Set:  Sun Science
Value:  55¢ First Class Mail Rate (Forever)
First Day of Issue:  June 18, 2021
First Day City:  Greenbelt, Maryland
Quantity Issued:  18,000,000
Printed by:  Banknote Corporation of America
Printing Method:  Flexographic, Foil Stamping
Format:  Panes of 20
Tagging:  Phosphor, block tag

Why the stamp was issued:  To showcase the powerful and mysterious science behind the functioning of our sun.

About the stamp design:  Pictures a colorized images from NASA’s Solar Dynamics Observatory of coronal loops.  According to NASA, the color of this stamp represents an image of the sun as viewed with “light at 304 Angstroms, an extreme ultraviolet wavelength.”

First Day City:  The First Day of Issue Ceremony was held at Greenbelt Main Post Office.  It was originally to be held at the NASA Goddard Space Flight Center, but was moved due to observance of the Juneteenth Federal Holiday and the facility being closed.

About the Sun Science set:  Includes 10 stamp designs picturing different details of our sun along with phenomena associated with it.  Each design pictures a colorized image from NASA’s Solar Dynamics Observatory.  The different colors represent a different wavelength that reveals or highlights a particular aspect of our sun.

History the stamp represents:  Some people call the Sun a yellow dwarf star.  However, this is more of a nickname than an actual scientific designation.  (The Sun is officially classified as a G-type main-sequence star.)  It is easy to understand how this got started, since G-type main-sequence stars tend to range in color from white to pale yellow.

However, sometimes our Sun appears in other colors.  This is because of the way visible light is scattered by Earth’s atmosphere.  This phenomenon makes the Sun and sky appear orange, red, and other vibrant colors at sunrise and sunset.  In reality, our Sun is actually white – the brightest intensity of light the human eye can distinguish.  But the Sun looks completely different when viewed in the ultraviolet or other higher-level spectrums.  That is why NASA uses a number of special filters when studying certain parts of the Sun.

Our Sun is not the only G-type main-sequence star in our corner of space.  Several nearby stars fall into the same category.  These include Alpha Centauri A, Tau Ceti, and 51 Pegasi.  Tau Ceti may be the most similar of these three to our Sun.  It, too, has planets thought to be capable of supporting life (a similar distance from their star as Earth is from the Sun).  It makes you wonder what other “suns” might be out there…

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US #5599
2021 Coronal Loops – Sun Science

  • Pictures coronal loops on our sun
  • One of 10 stamps in the Sun Science set


Stamp Category: 
Commemorative
Set:  Sun Science
Value:  55¢ First Class Mail Rate (Forever)
First Day of Issue:  June 18, 2021
First Day City:  Greenbelt, Maryland
Quantity Issued:  18,000,000
Printed by:  Banknote Corporation of America
Printing Method:  Flexographic, Foil Stamping
Format:  Panes of 20
Tagging:  Phosphor, block tag

Why the stamp was issued:  To showcase the powerful and mysterious science behind the functioning of our sun.

About the stamp design:  Pictures a colorized images from NASA’s Solar Dynamics Observatory of coronal loops.  According to NASA, the color of this stamp represents an image of the sun as viewed with “light at 304 Angstroms, an extreme ultraviolet wavelength.”

First Day City:  The First Day of Issue Ceremony was held at Greenbelt Main Post Office.  It was originally to be held at the NASA Goddard Space Flight Center, but was moved due to observance of the Juneteenth Federal Holiday and the facility being closed.

About the Sun Science set:  Includes 10 stamp designs picturing different details of our sun along with phenomena associated with it.  Each design pictures a colorized image from NASA’s Solar Dynamics Observatory.  The different colors represent a different wavelength that reveals or highlights a particular aspect of our sun.

History the stamp represents:  Some people call the Sun a yellow dwarf star.  However, this is more of a nickname than an actual scientific designation.  (The Sun is officially classified as a G-type main-sequence star.)  It is easy to understand how this got started, since G-type main-sequence stars tend to range in color from white to pale yellow.

However, sometimes our Sun appears in other colors.  This is because of the way visible light is scattered by Earth’s atmosphere.  This phenomenon makes the Sun and sky appear orange, red, and other vibrant colors at sunrise and sunset.  In reality, our Sun is actually white – the brightest intensity of light the human eye can distinguish.  But the Sun looks completely different when viewed in the ultraviolet or other higher-level spectrums.  That is why NASA uses a number of special filters when studying certain parts of the Sun.

Our Sun is not the only G-type main-sequence star in our corner of space.  Several nearby stars fall into the same category.  These include Alpha Centauri A, Tau Ceti, and 51 Pegasi.  Tau Ceti may be the most similar of these three to our Sun.  It, too, has planets thought to be capable of supporting life (a similar distance from their star as Earth is from the Sun).  It makes you wonder what other “suns” might be out there…