“I personally can't tell the difference between a supermoon and a regular moon,” Fred Espenak, a scientist emeritus for NASA’s Goddard Space Flight Center, told Morning Edition.

FRED ESPENAK: The moon orbits the Earth in an elliptical orbit. When it's along the closest section of its orbit to the Earth, if that happens to coincide with full moon, then we call that a ...

"I personally can't tell the difference between a supermoon and a regular moon," Fred Espenak, a scientist emeritus for NASA's Goddard Space Flight Center, told Morning Edition.

“I personally can’t tell the difference between a supermoon and a regular moon,” Fred Espenak, a scientist emeritus for NASA’s Goddard Space Flight Center, told Morning Edition.

For staunch astronomers, it is usually the closest moon of the year to Earth, but astrophysicist Fred Espenak gives the title to full moons that come within 90 percent of the closest approach to ...

If you enter Evansville’s latitude, longitude and elevation into Eclipse Wise – a website run by retired NASA astrophysicist Fred Espenak – it claims maximum totality would hit the city ...

The blue lines on this map indicate the path of the August 12, 2045 total solar eclipse. The umbra of the eclipse will pass directly over South Florida at around 1:30 p.m. (Courtesy Fred Espenak ...

Astrophysicist Fred Espenak has seen 30 total solar eclipses over 54 years; he runs a website called Mr. Eclipse and still, he describes this sense of overwhelming awe: ...

Despite the fervor surrounding the 2024 total solar eclipse, these types of celestial events take place roughly every 18 months, according to astronomers.

"You want to avoid any type of cloud, if you can," Fred Espenak, a former astrophysicist from NASA Goddard Space Flight Center and author of "Road Atlas for the Total Solar Eclipse of 2024," told ...