Astronomers may have just solved a mystery 10 billion years in the making.
It has to do with so-called "blue hook" stars, which have less than half the mass of the sun but burn 10 times hotter and are far more luminous. No one was ever able to explain the stars' unusual properties.
The destruction of the discs caused the blue hook stars to rotate more rapidly than they otherwise would have, according to the research. That, in turn, affected the evolution of the stars, leaving them with unusually heavy cores that burn very brightly.
Artist's impression of a protostellar disc being disrupted by a collision.
What was it that collided with the discs? Other stars. After all, the star clusters in which blue hooks are believed to have formed were densely packed with stars.
"We've solved an old puzzle," study co-author Dr. Antonino Milone of the Australian National University School of Astronomy and Astrophysics in Canberra said in a written statement. "Our new explanation is quite simple, and it hangs together really nicely," added co-author Dr. Aaron Dotter, another researcher at the university.
To reach their conclusion, the team studied the globular cluster Omega Centauri, according to the statement. It contains about 10 million stars in close proximity to one another.
CORRECTION: An earlier version of this article stated that Omega Centauri is the only star cluster visible to the naked eye. In fact, others, including the Pleiades, are visible without the help of binoculars or telescopes.
Hubble Captures View of 'Mystic Mountain'
ACS Image of NGC 5866
Giant "Twisters" in the Lagoon Nebula
The Spirograph Nebula (IC 418)
30 Doradus in Ultraviolet, Visible, and Red Light
The Ant Nebula (Menzel 3): Fiery Lobes Protrude From Dying, Sun-like Star
The Eskimo Nebula (NGC 2392)
Dying Star HD 44179, the "Red Rectangle," Sculpts Rungs of Gas and Dust
Galaxy Triplet Arp 274
Cassiopeia A: Colorful, Shredded Remains of Old Supernova
Rainbow Image of the Egg Nebula
Jet in Carina: WFC3 UVIS Full Field
Jet in Carina
Starburst Galaxy M82
Picture Album: Hubble's Black and White View of the Universe
The Eagle Has Risen: Stellar Spire in the Eagle Nebula
Ring of Hot Blue Stars Pinwheels Around Yellow Nucleus of Hoag's Object Galaxy
Nucleus of Galaxy Centaurus A
Saturn's Rings in Ultraviolet Light
HST ACS/WFC Image of NGC 3021
NASA's Great Observatories Examine the Galactic Center Region
Interacting Spiral Galaxies NGC 2207 and IC 2163
Combined X-Ray and Optical Images of the Crab Nebula
Hubble's Sharpest View of the Orion Nebula
Star-Forming Region S106
A String of 'Cosmic Pearls' Surrounds an Exploding Star
A Perfect Storm of Turbulent Gases in the Omega/Swan Nebula (M17)
Three Moons Cast Shadows on Jupiter
The Helix Nebula: a Gaseous Envelope Expelled By a Dying Star
"Light Echo" Illuminates Dust Around Supergiant Star V838 Monocerotis (V838 Mon)
The Cat's Eye Nebula: Dying Star Creates Fantasy-like Sculpture of Gas and Dust
Optical and X-ray Composite Image of SNR 0509-67.5
Our final 2024 mock draft projects four quarterbacks in the first five picks, but the Cardinals at No. 4 might represent the key pivot point of the entire board.
Trump is entitled to an additional 36 million shares if the company's share price trades above $17.50 "for twenty out of any thirty trading days" over the next three years.
Dan Wetzel, Ross Dellenger & SI’s Pat Forde react to the huge performance this weekend by Texas QB Arch Manning, Michigan and Notre Dame's spring games, Jaden Rashada entering the transfer portal, and more
Ford offers the new Mustang's updated 5.0-liter Coyote V8 as a crate engine, and it also sells a supercharger kit that unlocks a total of 810 horsepower.
Arch Manning gave Texas football fans an enticing look at the future, throwing for 355 yards and three touchdowns in the Longhorns' Orange-White spring game.