Arkansas SkyDome Planetarium
Arkansas SkyDome Planetarium
July 4 - 4th of July Penumbral Lunar Eclipse

As fireworks finish up this 4th of July, look skyward to see the first of two penumbral lunar eclipses for 2020. A penumbral lunar eclipse occurs when the moon passes through the outer shadow of Earth.

As viewed from the Moon, the Earth only partially covers the Sun. Thus with the lunar surface still receiving sunlight, albeit limited, the challenge is seeing the subtle shadow on the Moon. The best time to look is at the peak which occurs at 11:30pm. As shown in the simulation below, the roughly top 25% will be shadowed.

The eclipse begins at 10:07pm (probably be closer to 11pm before you'll notice any shadowing).
The peak is 11:30pm
The Full 'Buck' Moon occurs at 11:44pm
Eclipse ends at 12:52am.

The next penumbral eclipse will occur during the early morning hours of Nov. 30th
Arkansas SkyDome Planetarium
Arkansas SkyDome Planetarium
July 4 - Happy Aphelion Day!

Today Earth reaches its farthest point from the Sun for the year at just over 94.5 million miles. This makes the sun slightly smaller in the summer sky.

At 18.2 miles/sec it is also the day we are moving at our slowest orbital speed.

Helpful Links

ArkansasSky Store
Space themed apparel, decor and more.

High-end video projection system to bring the latest technology, programs and opportunities into the SkyDome.

Sponsor Needed: $40,000

Southern Delta Aquariids meteor shower
Peaks in late July