"Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled out daily in high schools."
--1921 New York Times editorial about Robert Goddard's revolutionary rocket work.

"Correction: It is now definitely established that a rocket can function in a vacuum. The 'Times' regrets the error."
NY Times, July 1969.

— New York Times

APOD

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Astronomy Picture of the Day
URL: https://apod.nasa.gov/
Updated: 17 hours 57 min ago

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Sun, 04/21/2024 - 4:00pm

Something strange happened to this galaxy, but what?


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Sat, 04/20/2024 - 12:00pm

How does a total solar eclipse end?


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Palm Tree Partial Eclipse

Fri, 04/19/2024 - 8:00am

Only those


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Total Totality

Thu, 04/18/2024 - 4:00am

Total Totality


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Eclipse in Seven

Wed, 04/17/2024 - 12:00am

Start at the upper left above and you can follow the progress of


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Wed, 04/17/2024 - 12:00am

What wonders appear when the Moon blocks the Sun?


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Tue, 04/16/2024 - 12:00am

Captured in this snapshot, the shadow of the Moon came to Lake Magog,


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Sun, 04/14/2024 - 8:00pm

How does a comet tail change?


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Sat, 04/13/2024 - 4:00pm

Will the sky be clear enough to see the eclipse?


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Unwinding M51

Fri, 04/12/2024 - 12:00pm

The arms of a grand design spiral galaxy 60,000 light-years across are


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The Solar Corona Unwrapped

Thu, 04/11/2024 - 8:00am

Changes in the


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Comet Pons-Brooks at Night

Wed, 04/10/2024 - 4:00am

Comet Pons-Brooks at Night


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Tue, 04/09/2024 - 12:00am

What created this unusual celestial firework?


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Tue, 04/09/2024 - 12:00am

Only in the fleeting darkness of a total solar eclipse is the


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Sun, 04/07/2024 - 8:00pm

What's happening to the big black hole in the center of our galaxy?


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