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View Full Version : Discussion: The Universe Used to Be More Blue



Fraser
2003-Dec-19, 11:02 PM
SUMMARY: Although the Universe is currently a beige colour overall, it used to be more blue, according to astronomers with the European Southern Observatory. This was caused by the predominantly hot, young blue stars in the most distant galaxies - astronomers are seeing them when the Universe was only 2.5 billion years old. The astronomers worked out the distance and colour to 300 galaxies which were contained within the Hubble Deep Sky survey, which took a deep look at a region of sky in the southern constellation of Tuscanae.

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Littlemews
2003-Dec-19, 11:10 PM
Blue color is hot and red color is cool >< so confuse or red color is hot and blue color is cool?????? :blink: :blink:

Fraser
2003-Dec-19, 11:49 PM
Blue is hot, red is cool.

Littlemews
2003-Dec-20, 12:06 AM
oh :)

Matthew
2003-Dec-20, 03:21 AM
So its logical, as the universe expands and cools it is changing color from the hot blue.

Littlemews
2003-Dec-20, 06:54 PM
I am still confuse about this..Far away object is red color and close object is blue :) , Why?