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Sun
Sun activity: Parker Solar Probe’s record-breaking flyby
Sun activity for September 29 is low, as the Parker Solar Probe completes its closest approach to the sun to date.
September 29, 2023
Astronomy Essentials
Visible planets and night sky for September and October
The full Harvest Moon shines brightly overnight night tonight, September 28-29. Visible planets for the month of September and October, here.
Human World
Space
A Dyson sphere harvests the energy of stars
A Dyson sphere is a megastructure that could theoretically harvest all the energy of a star and supply an advanced alien civilization.
September 29, 2023
Moon Phases
September full moon 2023 is a super Harvest Moon
The September full moon - the Harvest Moon supermoon - happens overnight on September 28-29, 2023. This full moon lies between Jupiter and Saturn.
September 28, 2023
Astronomy Essentials
What makes the Harvest Moon special?
The Northern Hemisphere's Harvest Moon falls overnight September 28-29, 2023, or almost 6 days after the September equinox. It's also a supermoon!
September 28, 2023
Earth
Sycamore Gap tree in the U.K., remembered in images
Sycamore Gap tree in Northumberland National Park was felled overnight on September 27-28, 2023. Here are a few images of the tree flooding social media.
September 28, 2023
Astronomy Essentials
Last of 4 full supermoons for 2023 is tonight
We had 4 full supermoons in a row in 2023. The last one for this year is tonight. Supermoons look brighter than ordinary full moons.
September 28, 2023
Astronomy Essentials
Guy Ottewell’s Astronomical Calendar 2024 is here
The popular and information Astronomical Calendar for 2024 by Guy Ottewell is available. It comes in either electronic or printed form. Learn more here.
September 28, 2023
Spaceflight
Space is hard on the human body. Here’s what we’re learning
Space is hard on the human body and mind. Scientists are working to find ways to improve the lives and health of astronauts in space and back at home.
September 27, 2023
Human World
Moon Phases
Do you sleep less before a full moon? Research says yes
A new study shows that - whether you live in a rural or urban environment - you might sleep less before a full moon.
September 27, 2023
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