Posts by 

Larry Sessions

No leap second for December 31, 2021

World timekeepers have decreed there will be no leap second on December 31, 2021. Overall the spin of Earth is slowing down, but in 2020 it sped up.

The Magellanic Clouds, our galactic neighbors

The Large and Small Magellanic Clouds are two of the closest galaxies to the Milky Way. They can be seen without optical aid from southern skies.

The colors of the stars you can see with your eyes

December is the perfect time for noticing the colors of the stars. Never noticed them? Check them out tonight!

Achernar marks the End of the River

Achernar is the 9th brightest star and flattest star known. It marks the end of Eridanus the River. Here's why much of Earth never sees it ... and how you can.

Fomalhaut, loneliest star, near Jupiter and Saturn in 2021

Fomalhaut is known as the “lonely one” or the "solitary one" as it shines brightly in a patch of sky with no other bright stars nearby.

Use Big Dipper to find Polaris in September

Use the famous Big Dipper to find Polaris, the North Star. In September, the Big Dipper is in the northwest in the evening. But watch for it soon!

Explore the Lagoon Nebula, Messier 8

The Lagoon Nebula, or Messier 8, is a large emission nebula in the constellation Sagittarius that observers can explore with binoculars.

Why 61 Cygni is nicknamed Flying Star

Compared to other stars, 61 Cygni moves quite rapidly against the background of more distant stars, revealing its proximity to Earth.

Spica, bright beacon of Virgo, is 2 stars

Spica is a very close, scorching-hot pair of stars, whirling around one another. One may someday go supernova.

Summer Triangle star: Altair spins fast!

Altair is only 16.8 light-years from Earth, making it one of our closest stellar neighbors. It's variable in an usual way, and it spins fast!