Hey there! It's been one of those weeks where space news feels less like news and more like poetry. I don't know how else to describe it. There's something in here that reminded me why I started doing this in the first place. Hopefully you'll feel it too.
🎬 Also — we're kicking off a Best Space Movie Bracket! Think Interstellar vs. The Martian, Gravity vs. Apollo 13 — 16 films, one champion, decided by you. Just reply to this email with your pick for the greatest space movie ever made, and I'll use your votes to seed the first round. More details (and the full bracket) coming in an upcoming issue.
Here's whats orbiting in today's issue:
🌌 Helium confirms Big Bang predictions
🚀 Two Artemis astronauts step back
🛰️ Chariklo's rings are transforming
🕳️ Rogue black hole caught feeding
🪨 Mercury shrinking faster than expected
📸 Image of the Day
Dust and Water in Sagittarius A Webb’s mid-infrared data revealed the clear signature of oxygen-rich silicate dust, as well as, for the first time, water, in its surrounding dust envelope. | Credit: ESA/Webb, NASA & CSA, F. Peißker, J. Lu, F. Yusef-Zadeh, N. B. Sabha, C. Chan*
🌌 Astronomers Use Helium to Confirm Big Bang Element Theories Read More
Ohio State University astronomers led the LBT Yp project studying primordial helium abundance in metal-poor nebulas to test Big Bang nucleosynthesis predictions and constrain neutrino physics from the universe's first seconds.
The team analyzed 48 high-quality galactic samples using Large Binocular Telescope optical and infrared spectra, reducing helium abundance measurement uncertainty from approximately two percent to nearly half a percent precision.
According to co-author Richard Pogge, confirming three neutrino species matches the standard model of particle physics, validating decades of theoretical predictions about conditions seconds after the Big Bang.
🚀 Upcoming Launches
No launches today or tomorrow!
🚀 Artemis II Astronauts Step Back From Active NASA Duty Read More
NASA astronauts Victor Glover and Reid Wiseman will transition to emeritus status at Johnson Space Center in September following their historic Artemis II lunar mission earlier this year.
The crew completed a 10-day mission aboard the Orion spacecraft atop the SLS (Space Launch System) rocket, splashing down April 10 after traveling farther from Earth than any humans previously.
According to Administrator Jared Isaacman, both astronauts will provide critical knowledge transfer for Artemis III preparations in 2027 and the planned Artemis IV lunar surface landing in 2028.
🛰️ Webb Telescope Reveals Chariklo's Rings Are Actively Changing Read More
The Andalusian Institute of Astrophysics led JWST observations of Chariklo, a 250-kilometer centaur located approximately 17 astronomical units from Earth, discovering its twin rings evolve on decadal timescales.
The October 2022 stellar occultation achieved kilometer-scale spatial resolution, revealing opposite changes in both rings: the inner C1R ring gained material while the outer C2R ring weakened significantly compared to previous observations.
According to researcher Pablo Santos-Sanz, these findings force scientists to reconsider ring formation mechanisms and stability processes, potentially informing understanding of other Solar System ring systems.
📅 Today in Space History
On September 11, 1997, the Mars Global Surveyor (MGS) spacecraft arrived at Mars and began its orbit insertion. This marked the beginning of its highly successful mission, which provided humanity with the most detailed global map of Mars ever created, revealing evidence of past and possibly recent liquid water and significantly advancing our understanding of the planet's geology and climate.
🕳️ Astronomers Catch Wandering Black Hole Feeding on the Move Read More
Westlake University astronomer Xin Li led a team studying an intermediate-mass black hole in dwarf galaxy UGCA 320, located approximately 20 million light-years away, discovering the first direct evidence of wake-driven accretion.
MUSE spectroscopy revealed broad Balmer emission indicating a black hole mass around 35,000 times the sun's mass, with observations from 2021 through 2026 showing variable emission as dense gas clumps periodically obscured the accretion region.
The team confirmed Bondi-Hoyle-Lyttleton accretion theory predictions, demonstrating how wandering intermediate-mass black holes can grow into supermassive black holes before sinking to galactic centers.
🪨 Mercury Is Shrinking Faster Than Scientists Previously Thought Read More
German Aerospace Center planetary scientist Gaku Nishiyama led research combining contraction maps with surface roughness data to reassess Mercury's shrinkage since formation approximately 4.5 billion years ago.
The analysis revealed impact crater debris obscures shortening structures in rough terrain, suggesting Mercury's diameter decreased by up to 14.5 miles total rather than the previously estimated 2.5 to 10 miles.
According to Nishiyama, the BepiColombo mission arriving November 2026 will provide higher-resolution surface scans to detect smaller tectonic features and potentially reveal even greater contraction than current estimates.
❓ Question of the Day
If aliens visited Earth tomorrow, what song should we play them first?
Send us a reply with your answer!
Appreciate you spending a few minutes here. If you know someone who'd enjoy this stuff, feel free to pass it along.
Clear skies ahead,
— Zapp
