Of Particular Significance

Auroras, Yes!! Comet, No.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON 10/11/2024

I hope many of you saw auroras (northern lights) last night! I briefly saw the strongest steady red glow I myself have ever observed, visible even amid street lights and my neighbors’ house lights.

The skies, shown only slightly brighter than to the naked eye, as seen at 8pm Boston time. Credit: Matt Strassler

Then, after a break as some clouds rolled in, we were graced with a few hours of mostly diffuse green glow with patches of dim but distinct red that would come and go. All these colors were visible with the naked eye, albeit much less bright than shown in photos. It was quite a storm, not as violently active as the one earlier this year, but very persistent.

The storm lasted all night, though the auroras varied greatly in brightness. Data from https://www.swpc.noaa.gov/

I also tried to find Comet A3 just after sunset, but failed, even with the help of binoculars. Apparently the brief spike in its brightness, due to “forward scattering” as it passed between us and the Sun, may have died off too quickly, leaving it impossible to see in early twilight. It will become dimmer day by day, but it will also be visible later each evening, and at some point should become easy to see in dark skies. Let me know when you first observe it!

Share via:

Twitter
Facebook
LinkedIn
Reddit

2 Responses

  1. Dr.Strassler:
    While the solar wind is composed of particles, protons & electrons, does radiation pressure from the suns photons also help push the tail away from the sun?

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Search

Buy The Book

Reading My Book?

Got a question? Ask it here.

Media Inquiries

For media inquiries, click here.

Related

If you’re curious to know what my book is about and why it’s called “Waves in an Impossible Sea”, then watching this video is currently

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON 11/04/2024

Recently a reader, having read my post about why the speed of light seems so fast, sent me two questions that highlight important cosmic issues.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON 10/28/2024