New NASA pictures show undiscovered black holes

The yellow circles show black holes with masses millions times greater than our sun. This is an artist's rendering of what one looks like.

NASA's Wide-field Infrared Survey Explorer (WISE) used infrared technology to find black holes that have been obscured by gas and dust.

They also found about 1,000 super bright galaxies that they nicknamed "hot dogs".

They put out 1,000 times more energy than our Milky Way.

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