How the EARTH sounds from SPACE: REAL SOUND

How the earth sounds like from space.

Space is a hollow surface, an emptiness in which no sound can propagate. So you might think that space is in absolute silence. Suppose you turn your ears into receivers of radio waves. In that case, the space around the Earth suddenly becomes a symphonic constant of strange and incredible sounds.

Let's listen to the music of space! You don't have to climb too high above the Earth to already be in space. Only 160 km high, the sound is no longer audible because there are not enough particles to spread sound waves.

Even here in space, you can find many other types of waves.

The ones that interest us most today are the electromagnetic waves that do not require other particles because they propagate by themselves through photons.

In fact, right now, you are enjoying electromagnetic radiation through the light when you watch this video. 

  • Radiation ranges from gamma rays with extremely high frequencies to radio waves that can be miles long.
  • There are also radio observatories and radio telescopes, some of which are currently orbiting the Earth.

We will enjoy what they have captured in the way radio waves are most frequently experienced: in sound frequencies that are converted into sound.

When we reach the Van Allen Belt, some fascinating sounds can already be heard in the large radiation band surrounding the Earth.

These sounds are produced by high-energy particles in the Earth's plasmasphere, which are hurled back and forth by the rotation of the Earth's magnetic field.

Around the Earth, there is a plasmasphere containing clusters of ions and electrons.

As the Earth and its magnetosphere rotate, magnetic fields penetrate these particles and accelerate them with a wave called plasma, similar to how disturbances in the oceans can cause waves to form.

You can hear these disturbances in the form of radio waves as they pass through one of NASA's Van Allen Probes:

  • They are called chorus waves and are often heard during sunrise, so it seems to be the Earth's singing.

A fantastic type of chorus wave closest to Earth is the hissing plasma wave, which sounds like space battles and lasers. These are generated in the colder and denser part of the plasmasphere and are caused by electromagnetic radiation emitted by lightning in the atmosphere.

The waves generated by these rays can bounce off the Earth's magnetic field. 

Since higher frequencies propagate faster than lower frequencies, they sound with a characteristic descending tone, similar to a whistle.

It is believed to be caused by electrons that, due to reconnection in the Earth's magnetic tail, move to the night side of the Earth and transfer their energy to the plasma when they collide with it.

In another area of the plasmasphere, we can find something called hiss waves:

  • These are believed to be chorus waves that have emerged from the inner plasmasphere.
  • They sound much more threatening and colder than the others we have heard so far.

The universe is singing  through its radio waves in space

Sound waves propagate mechanically like oscillation and require a medium - liquid, solid or gaseous - for propagation.

And while interplanetary (and interstellar) space is not empty. Gas molecules and dust grains are scattered so that they do not form a continuous medium that allows the direct transmission of sound waves.

However, there are many places in the solar system that have an atmosphere or an ocean, which can be quite loud.

The meteor that "touched" Earth made Venus come to life

The meteor that "touched" Earth made Venus come to life.

Recently, traces of phosphine gas have been found in the clouds of Venus, suggesting that it could support life. But a new study suggests that the compounds may have originated on Earth.

Harvard researchers suspect that the biosignature gas arrived on Venus from meteorites that hit our planet's atmosphere and crashed on the distant planet.

The study finds that at least 600,000 space rocks immersed in the Earth's atmosphere have collided with Venus in the last 3.7 billion years.

The 2017 meteor crashed into the Earth's atmosphere at 35,000 miles per hour for a minute and a half before returning to space.

Based on its trajectory as it skimmed the atmosphere, the team estimates that the rock had a diameter of about 12 inches and probably weighed at least 132 pounds.

Although the abundance of Earth's life in the upper atmosphere is unknown, these planetary shepherds may have been able to transfer microbial life between the atmospheres of Earth and Venus," says the Harvard study.

Origin of life on Venus may be indistinguishable from life on Earth

Previous research has shown that life can be found up to an altitude of 43 miles from the surface.

Asteroids touching Earth can dive 52 miles deep without significant warming. Another deeper asteroid would kill any life it has collected from our planet.

More work is needed to investigate the existence and abundance of microbial life in the upper atmosphere," says the study.

The team also notes that if a meteorite from Earth enters another planet's atmosphere, the hitchhiker microbes could be released into the clouds before the rock dissolves into the atmosphere.

A future probe that could sample the habitable cloud cover of Venus could allow direct detection of microbial life outside of Earth:

  • In particular, the ability to analyze microbes directly on-site or send an atmospheric sample to Earth will be crucial to plan a successful mission.
  • Finding the same genomic material on Venus and Earth would be clear evidence of panspermia.

The researchers have warned that phosphine detection is not substantial evidence of alien microbial life. The phosphine gas indicates that potentially unknown geological or chemical processes are taking place on the planet.

Is there alien life out there? 

Mankind has been wondering about it for decades, and it could finally become a reality. Astronomers have discovered that there could be life on Venus. Does this mean that we will finally meet the aliens? Could this help us discover more aliens?.

World's first full-scale, commercially viable hydrogen-powered plane

World's first commercially viable hydrogen powered plane.
hydrogen-powered plane

Aircrafts powered by Hydrogen: the world's first "commercially available" hydrogen-powered long-haul aircraft takes off over Great Britain in a big step towards zero emissions flights. The six-seater Piper M-Class aircraft has completed a 20-minute flight from Cranfield Airport in Bedfordshire.

The small airplane is powered by hydrogen fuel cells

The company that built the aircraft, ZeroAvia, received £2.7 million from state resources in September 2019. ZeroAvia will attempt the next attempt to fly the six-seater hydrogen powered aircraft 250 miles from the Orkney Islands. 

A commercially available full-size hydrogen-powered aircraft has completed a successful flight over the skies of Bedfordshire, a world premiere. 

Behind the first flight is the British company ZeroAvia, which hopes that commercial aviation will be emission free by 2023. 

The successful 20-minute flight included a cab, take-off, full circumnavigation and landing and will be followed this year by a 250-mile flight from the Orkney Islands.

The six-seater Piper M Class aircraft took off from Cranfield airport, where ZeroAvia's research and development facilities are located. 

The hydrogen fuel cells generate electricity to power a battery and an engine by mixing hydrogen and oxygen - which is supplied by air - through a chemical reaction.   

The only waste product of this process is water

unlike traditional aviation, which is one of the main responsible for greenhouse gas emissions. 

Previous research has shown that flying is responsible for about 3.5% of humanity's contribution to climate change.

While some experimental aircraft have flown with hydrogen fuel cells as an energy source, the size of this commercially available aircraft shows that paying passengers could soon embark on a truly emission-free flight.

The company's Hyflyer project received £2.7 million in government funding last year. 

  • Although the company claims that this flight was innovative, there are other examples of hydrogen powered aircraft.
  • Already in 2016, a plane called HY4, which can carry four people, completed a flight from Stuttgart airport in Germany, powered exclusively by hydrogen fuel cells.
  • HY4 was developed by researchers from the German Aerospace Center together with "partners from industry and research".
  • However, the unique feature of ZeroAvia flight is that Piper's M-Class is commercially available, while HY4 is not.

Is hydrogen the future of flight?

While the widespread use of hydrogen propulsion in airplanes is still very far away, the technology is already used in land transport, even if on a small scale. In the British capital London, for example, hydrogen buses have been introduced.

However, research does not show a great future for aircraft that transport energy in a battery. The battery is not suitable for flying aircraft of any size, except perhaps for special gliders.

Aircraft are an integral part of the travel industry. Millions of vacationers go on vacation every year to visit their favorite countries or to discover new destinations. It's not exactly environmentally friendly - that's why many scientists are researching how air travel can be made more sustainable.