Posts by 

Deborah Byrd

The moon and the Scorpion July 19 to 21

Watch for the moon and the Scorpion - aka Scorpius - on July 19, 20 and 21, 2021. The moon will be closest to Antares, Heart of the Scorpion, on July 19.

Ride along with Juno past Ganymede and Jupiter

Ride along with Juno, as the spacecraft sweeps past Jupiter and its largest moon Ganymede. Gorgeous video from Juno, which has orbited Jupiter since 2016.
Space

Most-massive white dwarf living on the edge

The most-massive white dwarf now known is ZTF J1901+1458. It's thought to have formed when 2 less massive white dwarfs merged. It has 1.3 times our sun's mass.

What causes a highway mirage?

A highway mirage is most often seen in summer, when the roadway ahead of you might be much hotter than the air above. Here's what causes it.

Polaris and Thuban via the Big Dipper in July

Polaris and Thuban have this in common: both reside, or have resided, at the apex of Earth's sky. That is, both are famous pole stars.

US intelligence report: 140 unexplained UFOs, no aliens

A newly released U.S. intelligence report cannot "confirm or deny" that the unidentified aerial phenomena, or UAPs, sighted by Navy pilots are due to alien visitors.

Heat grips Pacific Northwest

Meteorologists issue warnings, watches and advisories as extreme heat grips Pacific Northwest this weekend, into next week. Triple-digit highs expected.

Solar array upgrade planned for 3rd ISS spacewalk June 25

A June 25 spacewalk will help give the International Space Station a solar array upgrade, a 20 to 30% power boost aimed at another decade of science operations.
Earth

Taupo supervolcano needs monitoring, scientists say

Earth's most recent supervolcano is the Taupo supervolcano, from 25,000 years ago. It experienced unrest in 2019. Scientists want to know more.

Analemma shows the sun’s path over a year

An analemma is a figure-8 curve showing the position of the sun at a chosen time of day (often, noon) over a year. Here's one on the side of a house.