SIGNS OF LIFE: COULD A SUPERNOVA BE A SIGNAL?
BBC Science Focus|August 2023
Astronomers think aliens could use supernova explosions to inform us of their presence
COLIN STUART
SIGNS OF LIFE: COULD A SUPERNOVA BE A SIGNAL?

Imagine you're an alien on a distant planet and you're desperate to let everyone know you're there. Instead of howling aimlessly into the void, how can you give yourself the best chance of being heard? According to new research, extraterrestrial civilisations could piggyback a signal onto one the brightest beacons in the known Universe: a supernova.

These cataclysmic explosions detonate as the biggest stars die. For a time they shine as brightly as 10 billion Suns and release as much energy as the Sun will emit in its entire 10-billion-year lifetime. When a supernova goes off, astronomers sit up and take notice.

In May this year, astronomers erupted in a flurry of excitement when they spotted the supernova SN 2023ixf detonate in the Pinwheel Galaxy (also known as M101). "It was the closest supernova in a decade," says James Davenport, an assistant professor at the University of Washington. It was bright enough to see with amateur telescopes, even though M101 is 21 million light-years away.

Diese Geschichte stammt aus der August 2023-Ausgabe von BBC Science Focus.

Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.

Diese Geschichte stammt aus der August 2023-Ausgabe von BBC Science Focus.

Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.

WEITERE ARTIKEL AUS BBC SCIENCE FOCUSAlle anzeigen
COULD MARINE CLOUD BRIGHTENING HELP US FIGHT CLIMATE CHANGE?
BBC Science Focus

COULD MARINE CLOUD BRIGHTENING HELP US FIGHT CLIMATE CHANGE?

The theory behind marine cloud brightening is that brighter or whiter clouds reflect more sunlight back into space.

time-read
1 min  |
November 2024
IS IT SAFE TO RUN EVERY DAY, OR SHOULD I DITCH MY RUN STREAK TO SAVE MY KNEES?
BBC Science Focus

IS IT SAFE TO RUN EVERY DAY, OR SHOULD I DITCH MY RUN STREAK TO SAVE MY KNEES?

A running streak, where you run every day without taking rest days, can be highly motivating and beneficial for overall fitness. Running is great cardiovascular exercise and isn't to be discouraged (and finding a routine with some consistency is great). Getting a bit of exercise as often as possible is also hugely beneficial for your mental health.

time-read
1 min  |
November 2024
WHAT MAKES THE MEDITERRANEAN DIET SO GOOD FOR US?
BBC Science Focus

WHAT MAKES THE MEDITERRANEAN DIET SO GOOD FOR US?

The Mediterranean diet may help you live longer, especially if you also adopt the lifestyle of people living near the Med during the 1950s.

time-read
2 Minuten  |
November 2024
WHAT IS MEXICO'S BLUE HOLE?
BBC Science Focus

WHAT IS MEXICO'S BLUE HOLE?

The world's deepest blue hole (marine sinkhole) lies off the coast of Mexico's Yucatán Peninsula. It's at least 420m (1,378ft) deep, but explorers still haven't found its bottom.

time-read
1 min  |
November 2024
HOW CAN I TELL IF I'VE GOT HIGH CORTISOL LEVELS?
BBC Science Focus

HOW CAN I TELL IF I'VE GOT HIGH CORTISOL LEVELS?

Cortisol is a hormone produced by glands in our bodies called the adrenal glands, which sit above the kidneys. It plays a critical role in various bodily functions, including regulating metabolism, reducing inflammation and helping the body respond to stress. While essential for our health, chronic elevation of cortisol levels can lead to several issues.

time-read
2 Minuten  |
November 2024
THE LUNGFISH
BBC Science Focus

THE LUNGFISH

In 1836, European scientists discovered a peculiar animal from the River Amazon that they struggled to identify. Its eel-like body was a few feet long and its air-filled lungs persuaded anatomists it must be a reptile.

time-read
2 Minuten  |
November 2024
ARE WE THE ONLY SPECIES TO HAVE BEEN THROUGH A STONE AGE?
BBC Science Focus

ARE WE THE ONLY SPECIES TO HAVE BEEN THROUGH A STONE AGE?

The Stone Age might conjure up images of early humans, sitting around a campfire or hunting prehistoric beasts, but evidence shows that we're not the only species that has learned how to work with stone tools. Wild chimpanzees (Pan troglodytes) use stone tools to crack open nuts.

time-read
2 Minuten  |
November 2024
Should we scrap daylight saving time?
BBC Science Focus

Should we scrap daylight saving time?

Most of us look forward to the extra hour we get in bed every October, but researchers argue that changing the clocks twice a year harms our health

time-read
5 Minuten  |
November 2024
THE INTERNET OF ANIMALS
BBC Science Focus

THE INTERNET OF ANIMALS

SCIENTISTS ARE USING ELECTRONIC TAGS AND SATELLITES TO TRACK WILD ANIMALS AND CREATE A DATA NETWORK THAT COULD HELP US ADDRESS THE BIODIVERSITY CRISIS

time-read
8 Minuten  |
November 2024
MUSIC FOR A DISTRACTED GENERATION
BBC Science Focus

MUSIC FOR A DISTRACTED GENERATION

The number of things competing for our attention is often overwhelming. Can dreamy soundscapes created with neuroscience help our bewildered brains to concentrate?

time-read
10 Minuten  |
November 2024