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\title{Science AMA Series: We are Earth and solar scientists working with
NASA's TSIS-1 mission to measure how much sunlight reaches Earth and its
unexpected impacts on our climate. We live on a solar-powered planet,
AMA!}



\author[1]{NASAEarthRightNow }%
\author[1]{r/Science AMAs}%
\affil[1]{Affiliation not available}%


\vspace{-1em}



  
  \date{April 24, 2026}


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\begin{abstract}
Hello r/science! From space, NASA has been keeping an eye on Earth's
energy supply from the Sun for more than 40 years. For a long time,
scientists assumed the Sun's energy output was unwavering, they called
it the `solar constant.' But, by the 1980s, we learned that solar energy
reaching Earth was not constant, and fluctuates with solar activity on a
roughly 11-year cycle. This change in the total solar irradiance is just
one of the Sun's influences on Earth's atmosphere, weather, and climate.
We are here to talk all things TSIS-1 and Sun-Earth interactions.
Joining you today will be: Peter Pilewskie, professor of ocean and
atmospheric science, Laboratory for Atmospheric and Space Physics,
University of Colorado, Boulder Dong Wu, Earth scientist NASA Goddard
Space Flight Center Doug Rabin, solar physicist at NASA Goddard Space
Flight Center Jae Lee, Earth Scientists at NASA Goddard Space Flight
Center Candace Carlisle, Project Manager TSIS-1 at NASA Goddard Space
Flight Center Charles Ichoku, NASA Earth Scientist We'll be back to
answer your questions at 3 pm ET (12 PT), Ask Us Anything!%
\end{abstract}%



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