Tipsy Comet: Interstellar Visitor Loaded With Alcohol

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Hello and welcome to Astronomy Daily, your daily dose

of what's happening out there in the cosmos.

I'm Anna.

And I'm Avery.

It is Thursday, the 12th of March, 2026.

And today's show is a packed one.

We've got an interstellar comet that's absolutely loaded

with alcohol, a rocket that bounced back

from an explosive year to nail its seventh flight,

and the biggest NASA briefing in months.

The Artemis II flight readiness review

is happening right now as we record.

We've also got some beautiful science

from deep inside the sun, a satellite that came home early

thanks to the solar cycle, and a brand new gas cloud

discovered swirling around the black hole

at the heart of our Milky Way.

Dick's stories, let's get into it.

Our first story is one of my favorites in a while

because it involves an interstellar comet that's, frankly,

a little bit drunk.

You're going to milk that headline all episode, aren't you?

Every chance I get.

So three I ATLS, if you've been listening to us

over the past several months, you'll remember

this is only the third confirmed interstellar object

ever detected passing through our solar system.

It came from somewhere out there

from a completely different planetary system,

and it's been one of the most intensely observed objects

in recent memory.

And now astronomers using ALMA,

the adicama large millimeter sub millimeter array in Chile,

have published new findings about its chemical makeup,

and what they found is genuinely surprising.

Using ALMA's adicama compact array,

researchers studied the coma,

that glowing halo of gas and dust around the comet's core,

as three I ATLS was warming up on its approach towards a sun

in late 2025.

They focused on the fingerprints of two molecules,

methanol, which is a type of alcohol, and hydrogen cyanide.

And the results were extraordinary.

In most solar system comets,

those two molecules show up in roughly comparable amounts.

But in three I ATLS, the ratio of methanol

to hydrogen cyanide was between 70 and 120 to one.

That's not just unusual.

It places it among the most methanol-rich comets

ever studied, period.

Nathan Roth, the lead researcher

from American University, put it really beautifully.

He said, observing three I ATLS

is like taking a fingerprint from another solar system.

The details reveal what it's made of,

and it's bursting with methanol

in a way we just don't usually see in comets

from our own solar system.

There's another fascinating detail here, too.

In most comets, hydrogen cyanide flows out

from the nucleus, the central core.

Methanol usually does the same.

But in three I ATLS, the methanol is coming from two places,

the nucleus, and from tiny icy grains

drifting in the coma around the comet.

Those grains are essentially acting

like miniature comets of their own,

releasing methanol as they warm up in sunlight.

It's a level of structural complexity.

We haven't seen traced

in an interstellar object before.

What does all this methanol tell us?

It points to a comet that formed

in an extremely cold environment,

possibly a dark molecular cloud

packed with carbon monoxide ice,

and that its icy material was incorporated

into the comet's nucleus with very little alteration.

Essentially, this thing is a chemical time capsule

from a distant planetary system,

and it's older than our own sun.

And here's a fun watch this space moment.

Three I ATLS is currently

about 3.8 astronomical units from the sun,

roughly the distance between Mars and Jupiter,

and heading outward at around 28 kilometers per second.

On March 16th, just four days from now,

it makes its closest approach to Jupiter,

passing within about 0.36 AU.

It's one of the last major milestones

before this visitor disappears

into interstellar space for good.

It's been one of the most scientifically productive

interstellar visitors we've ever had the luck to catch.

Every observation has taught us something new

about how planetary systems,

not ours, form and evolve.

Story 2 is a proper comeback story,

and those are always fun to tell.

Firefly Aerospace successfully launched its Alpha Rocket

last night, Wednesday 11th,

from Vandenberg Space Force Base in California.

And it was a mission called Stairway to 7, Flight 7.

And it absolutely nailed it.

For context, Firefly had a rough 2025.

Two major mishaps, a failed launch in April,

and then an explosive ground test in September

that destroyed a first stage.

The rocket had been grounded for nearly 11 months,

so this was a significant moment for them.

The mission lifted off at 5.50 PM Pacific time,

completed nominal stage separation,

achieved orbital insertion,

and delivered a demonstrator payload for Lockheed Martin.

The second stage engine even performed a relight,

a bonus milestone for validating new systems.

And this wasn't just any flight.

Stairway to 7 was the last flight

of Alpha's Block 1 configuration.

Firefly is now transitioning to Block 2,

which is an upgraded version of the rocket.

Longer, more capable,

with a new in-house avionics suite

and improved thermal protection.

Those systems were tested in shadow mode on this flight

and confirmed working.

FEO Jason Kim said the mission was, quote,

flawlessly executed.

And while Alpha has now had full mission success

just three times in seven attempts,

the trajectory is clearly improving.

And Firefly's lunar landing success with BlueGhost

last year showed they can absolutely get the job done.

The first Block 2 flight will carry a US Space Force mission

called Victus Hades Jackal,

scheduled for no earlier than the second quarter of this year.

Firefly also has plans to expand Alpha operations

to Wallops Island in Virginia

and the S-Range Space Center in Sweden.

Good times ahead for this team.

All right, story three.

And this one is literally happening as we speak.

NASA held its Artemis II flight readiness review today,

Thursday the 12th,

at Kennedy Space Center in Florida,

with a press conference at 3 p.m. Eastern

featuring NASA Administrator Jared Isaacman.

A flight readiness review is a critical milestone.

It's the formal process where all the key mission stakeholders

come together and evaluate whether every system,

every procedure, and every person is ready to fly.

It's one of the last major gates

before a launch date gets set.

To recap where we are,

Artemis II is the first crewed mission of the Artemis program.

Four astronauts flying around the moon

and back inside the Orion spacecraft,

farther from Earth than any humans have ever traveled.

The crew is Reed Wiseman, Victor Glover,

Christina Koch,

and Canadian Space Agency astronaut Jeremy Hansen.

The mission hit a snag in late February

when a helium flow issue was found in the upper stage

of the space launch system rocket.

After a wet dress rehearsal,

the stack had to be rolled back

into the vehicle assembly building for repairs.

NASA has since identified and fixed

to seal obstruction in the quick disconnect causing the problem

and technicians have been validating the repairs.

The rocket is currently targeting a second rollout

to the launch pad later this month

with an April launch window on the table.

We'll have the outcome of today's press conference

in our show notes.

This story is moving fast

and we'll be covering every step of it as we get closer.

It has been over 50 years since humans flew beyond

low Earth orbit.

Artemis II is going to change that

and we are so close.

Well, we certainly hope so.

Story four is a beautiful piece of long game science.

Researchers from the University of Birmingham

and Yale University have published a study

in the monthly notices of the Royal Astronomical Society

that reveals something fundamental

and surprising about our star.

The Sun's internal structure shifts

measurably from one solar cycle to the next.

This might sound like it should be obvious.

Of course, the Sun changes, but here's the thing.

During solar minimum, the Sun is supposed to be

at its calmest.

Fewer sun spots, weaker magnetic fields,

a quieter, more uniform surface.

The assumption had always been that these quiet periods

were basically the same each time around.

And they're not.

The team used a network of six ground-based telescopes

called the Birmingham Solar Oscillations Network, Bison,

which has been listening to the Sun hum

for over 40 years.

They analyzed tiny vibrations inside the Sun,

essentially sound waves trapped inside the star

to infer what was happening beneath the surface.

This field is called Heliosysmology

and it's essentially the same principle

as using seismic waves to map the interior of the Earth.

They looked at four successive solar minima,

the quiet periods between solar cycles 21 and 25,

and found that the minimum between cycles 23 and 24,

which fell in 2008 to 2009,

was structurally different from the other three.

That minimum was already known

to be one of the quietest and longest on record,

but now they've shown it left a measurable internal fingerprint.

Specifically, a sound wave glitch caused by helium ionization

just below the Sun's surface was significantly stronger

than in the other three minima,

and the speed of sound in the outer layers was slightly higher,

suggesting subtly different gas pressures, temperatures,

and magnetic field strengths deep inside the Sun.

Why does this matter?

Because how the Sun behaves during its quiet periods

has a strong bearing on how active the next cycle will be.

Better understanding solar minima

means better space weather forecasting,

and space weather affects satellites, GPS, power grids,

and communications infrastructure here on Earth.

Professor Bill Chaplin from Birmingham summed it up perfectly.

For the first time, they've been able to clearly quantify

how the Sun's internal structure shifts

between one cycle minimum and the next,

and the techniques used here

could eventually be applied to other Sun-like stars

using ESA's upcoming Plato mission.

The Sun isn't just our star,

it's our best laboratory for understanding stars everywhere.

Following up on a story we brought you a couple of days ago,

you could say story five has a certain poetic quality to it.

Yesterday morning, Wednesday the 11th,

NASA's Van Allen Probe A re-entered Earth's atmosphere

and burned up over the Eastern Pacific Ocean,

ending a mission that launched back in August 2012,

nearly 14 years in space.

The Van Allen Probes, there were two of them, A and B,

were built to study Earth's radiation belts.

Those are the two massive donut-shaped zones

of high-energy charge particles

trapped by our planet's magnetic field.

They're named for physicist James Van Allen,

who discovered them in the late 1950s.

Understanding these belts is critical

because they shield Earth from cosmic radiation and solar wind,

but they can also be brutal on satellites

and spacecraft passing through them.

The Probes were originally designed for a two-year mission.

They ran for nearly seven.

During that time, they made a series of landmark discoveries,

including the first confirmed observation

of a transient third radiation belt,

which conformed during periods of intense solar activity.

The spacecraft ran out of fuel in 2019

and have been drifting in orbit ever since.

Here's what made yesterday's reentry newsworthy

beyond the usual satellite farewell.

NASA had originally calculated that probe A

wouldn't re-enter until 2034, eight years later than it actually did.

The culprit, the current solar cycle.

We're in a particularly active phase right now,

an increased solar activity heats and expands Earth's upper atmosphere,

which creates more drag on satellites in low-to-medium orbit,

holding them down faster than expected.

The 600 kg spacecraft mostly burned up on reentry, as expected,

with a 1 in 4,200 chance of any surviving debris

causing harm to anyone on the ground.

The US Space Force confirmed reentry at 637 AM Eastern time

over the Eastern Pacific.

No injuries or debris impact reported.

But Probe is still up there,

and its reentry isn't expected before 2030.

Though given what just happened,

we might want to keep an eye on that estimate, too.

The sun has a way of accelerating things.

And our final story brings us right to the heart of our own galaxy

and the super-massive black holes sitting there.

Astronomers at the Max Planck Institute

for extraterrestrial physics have discovered

a new gas cloud orbiting Sagittarius A star.

The 4 million solar mass black hole

at the center of the Milky Way, about 27,000 light years

from Earth.

The new cloud is called G2T.

And it was found using the Eurus Instrument,

the enhanced resolution imager and spectrograph,

mounted on the European Southern Observatories

very large telescope in Chile.

Two previous clouds, known as G1 and G2,

had been observed orbiting Sagittarius A star for years.

But their true nature was still hotly debated,

were they pure gas clouds or were they hiding stars inside them?

The discovery of G2T turns out to be the key

that helps answer that question,

because the three clouds don't just

share the same general neighborhood.

Their 3D orbits are almost identical,

just rotated slightly with respect to each other.

And here's why that's a big deal.

If G1, G2, and G2T each contain

a hidden star at their core, you'd expect

those stars to have very different orbital histories.

The odds of three independent stars

settling into nearly identical orbits

around the supermassive black hole are extraordinarily slim.

So the matching orbits strongly rule out

the hidden star hypothesis.

Instead, the astronomers believe all three clouds

likely share a common origin, a massive binary star

system called IRS-16 SW, which is in that region

and is known to be expelling enormous amounts of gas.

The three clouds may have been shed from that pair of stars

at different times, drifting into similar orbits

as they interact with the extreme gravitational environment

near Sagittarius A star.

The Galactic Center is one of the most

extreme environments in the universe.

Stars and gas clouds hurtling around the black hole

at tremendous speeds.

And yet, we're still finding brand new objects there

after decades of observation.

It's a reminder that our own cosmic backyard

still holds secrets, extraordinary ones.

That's all six stories for today.

What a show, a tipsy interstellar comet,

a triumphant rocket come back,

the imminent moon mission update,

the Sun's inner life, a satellite's fiery farewell,

and a new discovery at the very heart of our galaxy.

If you enjoyed today's episode, please subscribe,

leave us a review, and share us with someone who loves space.

You can find us at astronomydaily.io

and on all the major platforms at at AstroDailyPod.

And keep watching the skies.

Jupiter's about to get a very unusual close visitor

in just four days, three eye atlas,

making its last big swing before heading back to the stars.

From Anna and me,

thanks for listening to AstronomyDaily.

We'll see you tomorrow.

In the meantime, keep looking up.

The astronomy day, the star is the toe.

The star is the toe.

The star is the toe.

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