As our planet is fighting with the global pandemic, the scientists are also keeping their eyes on outer-space and the activities of earth. In the last couple of days, two popular news is coming from the space scientists and institutes, which will blow your mind. So let’s take a look:
Earth’s Crust Vibrations decreased due to COVID-19, Reveals Study.
Yes, that’s true. A research conducted by Royal Observatory of Belgium, Imperial College of London, and several other institutions globally, showed that there’s a slight reduction in seismic noise – a hum of vibrations generated by the earth’s crust. The scientists are saying it ‘dramatic.’ These vibrations are also known as seismic noise.
What’s a Seismic Noise?
The phenomenon caused by the vibrations happening in the Earth crust that travel like waves caused due to earthquakes, volcanoes eruption, human activities like traveling, and industrial activities using heavy machinery, is known as seismic noise. It is measured with a special instrument known as seismometers.
According to researchers, this dramatic reduction is mainly due to global lockdown caused by global coronavirus pandemic that affected millions of people’s lives around the world. A study published in the Science journal states: “The cause of this quietness is the total global effect of social distancing measures, drops in tourism and travel, closure of businesses, transport services, and industries.”
The research also states that the thing, which played a crucial role in reducing seismic noise is the humans living in densely populated areas. “The study found how much human activities impact the solid earth, which will enable us to identify the difference between natural noise and human clearly,” says study co-author Stephen Hicks from ICL, UK, reported by news agency IANS.
The research was conducted by analyzing the data of 286 seismic stations located in 117 countries. The researchers discovered that noises coming from the earth’s crust reduced a lot when compared with ‘before lockdown‘ seismic noise data. The researchers tracked the quietening wave between March and May when the worldwide lockdown got imposed.
The highest noise reduction got noticed in highly dense areas of the human population like Singapore, New York, Toyko, etc. The same goes for remote areas like Rundu in Namibia and Germany’s Black Forest.
Citizens who had seismometers also used them to measure localized noise and noticed a 20% drop in the noise around schools, industries, and universities around Cornwall, UK, and Boston, US.
The countries like Barbados, which are tourist’s main attractions, saw a 50& drop of seismic noise after the lockdown. “These changes allowed us to listen to Earth’s natural sound and vibrations without the human input distortions,” – says study authors.
NASA Shared images of Jupiter’s moon Ganymede for the first time
For the first time in the history of space missions, a man-made spacecraft clicked the North pole images of Ganymede, which is one of the 79 moons of Jupiter. This mission was made a success by NASA’s Juno spacecraft. The recent images shared by NASA’s Jet Propulsion Laboratory shows the glorifying sight of a gigantic moon. The images show a timeline of the moon that’s always reflecting the light of the sun from one half.
What is Ganymede?
It is the largest moon of Jupiter and our solar system. You can also call it the largest celestial body in the solar system, which does not have any atmosphere. If we compare it with the planets, then Ganymede will be the 9th largest object in the Solar System. According to scientists, it primarily consists of water ice, which gives us major clues regarding the evolution of the 79 Jovian moons of Jupiter since their birth.
NASA claims that right now, it’s the only natural satellite that has its magnetic field that attracts plasma (charged particles emitted by Sun). Due to this, its surface experience constant plasma bombardment from Jupiter’s gigantic magnetosphere. It left the ice formation on Ganymede in an amorphous form.
Juno Spacecraft Observations
Juno Spacecraft was launched by NASA in August 2011 to orbit around Jupiter. Its mission was to help us clearly understand the beginning of the solar system by analyzing and revealing the origin and evolution of the largest planet, Jupiter.
On December 26, 2019, Juno Spacecraft flew close to the Ganymede North Pole and clicked the pictures using the equipment onboard. With the helo of the flyby and Jovian Infrared Auroral Mapper, Juno was able to record the first infrared image of this celestial object. “Throughout the mission, Juno enabled NASA to learn the modifications in ice and surrounding of Ganymede, caused due to precipitation of plasma,” – says Alessandro Mura, Juno co-investigator at the National Institute for Astrophysics in Rome.