Supernova: Exploding stars could leave their mark on Earth

Supernovas occur when a giant star runs out of energy. As it runs out of fuel to keep burning, the star expands massively before collapsing under its own gravitational pull.

Related articles
NASA news: Hubble Space Telescope observes incredible supernova
Milky Way: Mysterious space 'halo' offers 'clue to galaxy's past'

When it does, it releases a huge explosion which sends gas, debris and particles in all directions of the cosmos.

Now, scientists say there is evidence that distant supernovas could be detected here on Earth.

University of Colorado Boulder geoscientist Robert Brakenridge has conducted a study to reveal supernova evidence in trees.

Mr Brakenbridge revealed that carbon-14, also called radiocarbon, is a carbon isotope which is only found in trace amounts on Earth.

Supernova: Exploding stars could leave their mark on EarthSupernova: Exploding stars could leave their mark on Earth (Image: GETTY)

supernovaSupernovas occur when a giant star runs out of energy (Image: GETTY)

It is created when cosmic rays bombard the atmosphere of our planet.

However, trees can pick up radiocarbon, so by analysing tree rings, scientists can tell if there has been an increase in radiocarbon.

If there is, it means that a nearby star has released an abundance of cosmic rays.

Mr Brakenbridge said: "These are extreme events, and their potential effects seem to match tree ring records.

READ MORE: Star explosion near Earth may have triggered an ICE AGE - study

sunSun: facts and figures (Image: EXPRESS)

Related articles
NASA's Hubble captures a supernova shockwave 20,000 years after blast
NASA spots 'survivor' planet orbiting a dead star for the first time

"There's generally a steady

read more.....

PREV Who is @itvcorrie star Shelley King's wife? #Corrie #Corrie60
NEXT Murder charge following alleged brawl in Brisbane's east mogaznewsen