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Brown Dwarfs As Seen By An Interstellar Traveller. Postcard

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Signature Matte
18 pt thickness / 120 lb weight Soft white, soft eggshell texture
-$0.30

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Size: Standard Postcard

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  • Dimensions: 14.22 cm L x 10.79 cm H; qualified USPS postcard size
  • High quality, full-colour, full-bleed printing on both sides

Paper Type: Signature Matte

Our Signature Matte paper is a customer favorite—smooth to the touch with a soft eggshell texture that elevates any design. Its sturdy 18 pt weight and natural feel make it the ideal choice for timeless, sophisticated events.

  • Exclusively made for Zazzle
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About This Design

Brown Dwarfs As Seen By An Interstellar Traveller. Postcard

Brown Dwarfs As Seen By An Interstellar Traveller. Postcard

Artist's concept illustrating what brown dwarfs of different types might look like to a hypothetical interstellar traveller who has flown a spaceship to each one. On the left is an L dwarf, in the middle is a T dwarf, and on the right is a Y dwarf. The objects are progressively cooler in atmospheric temperatures as you move from left to right. The L dwarf is seen as a dim red orb to the eye. The T dwarf is even fainter and appears with a darker reddish, or magenta, hue. The Y dwarf is dimmer still. Because astronomers have not yet detected Y dwarfs at the visible wavelengths we see with our eyes, the choice of a purple hue is done mainly for artistic reasons. The Y dwarf is also illustrated as reflecting a faint amount of visible starlight from interstellar space. In this rendering, the traveller's spaceship is the same distance from each object. This illustrates an unusual property of brown dwarfs, that they all have the same dimensions, roughly the size of the planet Jupiter, regardless of their mass. This mass disparity can be as large as fifteen times or more when comparing an L to a Y dwarf, despite the fact that both objects have the same radius.

Customer Reviews

4.9 out of 5 stars rating15.6K Total Reviews
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5 out of 5 stars rating
By Heather D.20 September 2021Verified Purchase
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It was exactly like the pic on Zazzle. Size was good to write on the back. Image was great. Lovely colours and clear
5 out of 5 stars rating
By Dash K.23 January 2024Verified Purchase
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I was pleased with the excellent quality of the calendar and the high quality of the card stock used. I will definitely order these postcards again. The printing was excellent. I was so pleased!
5 out of 5 stars rating
By Lisa B.26 August 2019Verified Purchase
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Such a huge range of different frogs available, which made my choices very difficult and now the reason I have a whole draw full of cards and postcards! Much better quality than you can buy in the shops and they are exactly on the subject I love and adore too.

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dwarf starssizecomparisonspacebrown dwarfssubstellar objectsastronomical objectspurpleredcircle

Other Info

Product ID: 256106295064276441
Posted on 19/01/2024, 10:52 AM
Rating: G 
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