"One jarring aspect of the system is the sheer scale of it." - from the paper, Teachey and Kipping, 2018.
"If confirmed, this finding could completely shake up our understanding of how moons are formed and what they can be made of." - Thomas Zurbuchen, associate administrator of NASA's Science Mission Directorate.
"We saw little deviations and wobbles in the light curve that caught our attention." - David Kipping, Columbia University.
"It was definitely a shocking moment to see that Hubble light curve." - David Kipping, Columbia University.
The Exomoon's Origins: A Captured Object?
Sources:
Hubble News Release: "Astronomers Find First Evidence of Possible Moon Outside Our Solar System"
Research Paper: "Evidence for a large exomoon orbiting Kepler-1625b"