Latest sunsets follow summer solstice | | Latest sunsets - and latest evening twilights - are happening around now for much of the Northern Hemisphere. They always come in late June and early July. Meanwhile, the Northern Hemisphere's longest day fell on the June 20-21 solstice. For the Southern Hemisphere, your latest sunrises are happening around now. Plus, a word about 3 different kinds of twilight. Read more. | | |
Solar array upgrade planned for 3rd ISS spacewalk June 25 | | NASA plans to install new solar arrays on the International Space Station (ISS) this month. The first was to be installed June 16, but was delayed due to technical difficulties. Then, on Sunday, June 20, a 2nd spacewalk by 2 astronauts resulted in the successful installation of the first of 6 new ISS Roll-Out Solar Arrays (dubbed iROSAs). And now the 3rd spacewalk is scheduled for June 25, with the aim of installing the 2nd iROSA. When all 6 are installed, ISS will get about a 20% to 30% boost in power, aimed at supporting at least another decade of science operations. Details, plus how to watch online. | | |
Is Zubeneschamali a green star? | | Zubeneschamali, aka Beta Librae, is the brightest star in Libra. Earlier observers often described Beta Librae as a green star. It's still sometimes said to be the only bright star that's green in color. But nowadays astronomers say stars can't appear green in color. So is Zubeneschamali green? Read more. | | |
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