Sign up for our daily briefing

Make your busy days simpler with Axios AM/PM. Catch up on what's new and why it matters in just 5 minutes.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Stay on top of the latest market trends

Subscribe to Axios Markets for the latest market trends and economic insights. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sports news worthy of your time

Binge on the stats and stories that drive the sports world with Axios Sports. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Tech news worthy of your time

Get our smart take on technology from the Valley and D.C. with Axios Login. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Get the inside stories

Get an insider's guide to the new White House with Axios Sneak Peek. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Denver news?

Get a daily digest of the most important stories affecting your hometown with Axios Denver

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Des Moines news?

Get a daily digest of the most important stories affecting your hometown with Axios Des Moines

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Twin Cities news?

Get a daily digest of the most important stories affecting your hometown with Axios Twin Cities

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Tampa Bay news?

Get a daily digest of the most important stories affecting your hometown with Axios Tampa Bay

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Charlotte news?

Get a daily digest of the most important stories affecting your hometown with Axios Charlotte

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

The remnants of a supernova explosion. Photo: NASA/CXC/SAO

The first stars born just millions of years after the Big Bang are thought to have been massive, bright balls of helium and hydrogen, with heavy elements like carbon, zinc and iron forming in their cores.

Driving the news: A new study published in the Astrophysical Journal details how these stars died, seeding the universe with elements that eventually gave rise to our sun, planets, other stars and more.

What they found: The new study suggests that when these stars turned into supernovas, they didn’t explode in a spherical ball. Instead, new research shows the explosions were actually asymmetrical, shooting powerful jets of heavy elements out into neighboring galaxies.

What they did: The scientists studied the star HE 1327-2326, which is thought to be a surviving second-generation star that formed after the first generation of stars exploded.

  • The star was very rich in zinc, which the researchers argue could only happen if a first generation star exploded and seeded HE 1327-2326’s part of space with the heavy element.
  • And a series of 10,000 simulations showed the only way to explain the zinc signal in the star — which is located about 5,000 light-years away — was if a first generation star asymmetrically exploded.
“The working hypothesis is, maybe second generation stars of this kind formed in these polluted virgin systems, and not in the same system as the supernova explosion itself, which is always what we had assumed, without thinking in any other way. So this is opening up a new channel for early star formation."
— Anna Frebel, co-author of the new study, said in a statement.

Go deeper

Updated 52 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Health: Trump, Melania received COVID vaccine at White House in January — CDC director warns "now is not the time" to lift COVID restrictions.
  2. Vaccine: J&J CEO "absolutely" confident in vaccine distribution goals Most states aren't prioritizing prisons for COVID vaccines — Vaccine hesitancy is shrinking.
  3. Economy: Apple says all U.S. stores open for the first time since start of pandemic — What's really going on with the labor market.
  4. Sports: Poll weighs impact of athlete vaccination.
  5. World: Italy tightens restrictions as experts warn of growing prevalence of variants — PA announces new COVID restrictions as cases surge.
  6. Local: Colorado sets timeline for return to normalcy.
Updated 55 mins ago - Politics & Policy

Trump received COVID vaccine at White House in January

Photo: Noam Galai/Getty Images

Former President Trump and former first lady Melania Trump were both vaccinated at the White House in January, a Trump adviser tells Axios.

Why it matters: Trump declared at CPAC on Sunday that "everybody" should get the coronavirus vaccine — the first time he's encouraged his supporters, who have been more skeptical of getting vaccinated, to do so.

Biden administration seeks to allow separated migrant families to reunite in U.S.

Secretary of the Department of Homeland Security Alejandro Mayorkas announced Monday that the Biden administration will explore "lawful pathways" to allow migrant families separated under the Trump administration to reunite in the U.S.

Why it matters: Biden has pledged to reunite the hundreds of families still separated as a result of the Trump administration's "zero tolerance" policy, and signed an executive order last month creating a family separation task force chaired by Mayorkas.