Sunset on the Pacific in low tide. Have a beautiful start to your weekend.

Since the question of the age of the Universe is coming up on Twitter, here's a brief primer on what we know and what we don't. Punch line: all current evidence indicates the Universe is 13-14 billion years old.

The JWST Saturn image is taken at 3.23um in reflected light. CH4, lying high in the atmosphere, eats photons before they can be scattered back to the telescope by clouds or hazes. Cool brown dwarfs, like WISE0359 (from Beiler+ last week) are dark in this same bandpass because...

During my run this morning, I saw a dad smoking while carrying a baby in a kangaroo-style carrier in front of him. It’s so sad to see how someone can make that decision with all of the information available in this day and age.

Detection of gravitational waves from supermassive black hole mergers, detected by pulsar timing arrays ⁦NANOGrav PFC⁩ and ⁦International Pulsar Timing Array⁩ is out! This is the expected correlation between the signals received from pulsars across the sky when the GW background perturbs them.

Elusive neutrinos have just revealed a portrait of our galaxy unlike any before.

'This observation is ground-breaking ... the galaxy as a neutrino source. Every future work will refer to this observation.' —Ignacio Taboada, U.S. National Science Foundation IceCube spokesperson and Georgia Tech physicist

Because one very exciting astronomy news on gravitational wave background is not enough, icecube has revealed high energy neutrinos that come from our own Milky Way. IceCube Neutrino Observatory

Which am I most impressed by: pulsars; 15-yr exquisite, infinitesimal measurement of pulsars; the idea of using a galaxy full of pulsars as a detector; galaxy-mass black holes merging; or enough SMBHs merging long enough that the universe is full of waves? I need to go lie down.

Congratulations to my friends and colleagues NANOGrav PFC for an excellent press conference and their explanation of the exciting results!

International Pulsar Timing Array are using the entire galaxy as a massive gravitational wave detector — science is flippin’ amazing

Can we just take a moment to appreciate how amazing pulsars are?

I wanted to share some of my thoughts on today's Supreme Court decision on affirmative action:

Here is a quick 60-second explainer on the new Gravitational Wave Background result! I hope you all like it! youtu.be/9OoYvScSCK8

Love that chart…

Who is excited for the NANOGrav PFC and International Pulsar Timing Array announcement tomorrow?? You might feel the ripples from distant supermassive black holes...
nanograv.org/news/2023Annou…