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  • Earth lost its Magnetic Field?

    Body:  

    The earth’s magnetic field shields us from many things, including space rocks and charged atoms of solar winds. So, without the magnetic field we could be susceptible to the sun’s emissions and other cosmic events. Some scientists believe that the solar winds could rip holes into the ozone layer, increasing the risk of cosmic radiation on Earth. And this could be quite dangerous for living beings on our planet. In addition, a vanishing atmosphere could cause life-threatening climate changes and weather events. Nonetheless, let’s take a look at what will be happen if Earth loses its magnetic field:

    • Compasses may act weird- Compasses are tiny magnets, and like all magnets, they align themselves with nearby magnetic fields. Thankfully Earth’s magnetic field is strong enough to force compasses to align north to south. But with our planet’s magnetic field gone, compasses would point to any nearby source of magnetism.
    • Birds wouldn’t be able to navigate – Many birds, turtles, honeybees, fishes, and even fruit flies have biological compasses known as ‘magnetoreceptors’ built into their bodies. Birds use this capability to fly to warmer places during winter months, while turtles navigate the open ocean to lay their eggs on the beaches. If the Earth’s magnetic field disappeared, many animals that depend on compass navigation could be in serious trouble. 
    • Solar Wind could harm us – Solar winds are harmful to life on Earth, and without the protection of our magnetosphere, our planet would be regularly blasted by a stream of deadly atoms. If Earth’s magnetic field disappeared, the entire life on our planet would be in trouble. And these cosmic rays can have quite a horrifying effect on our body as it can damage DNA and increase risk of cancer and other illnesses.
    • Power outages & broken satellites – Without Earth’s magnetic field, satellites can suffer severe damage from solar winds, and even electronic devices could be exposed to deadly atoms. In fact, in the year 1989, a huge solar flare had slammed into Earth’s magnetosphere and threw away electricity out of gear in Quebec, Canada.
    • Atmosphere will be gone– The sun’s natural wind is so powerful that it can easily absorb all the gases out of a planet’s atmosphere. This is exactly what happened to Mars which was somewhat like Earth with water and atmosphere. But like Earth, its magnetic field disappeared billions of years ago. Its atmosphere was left completely exposed causing it to be torn away into space. So, there is no doubt that without our magnetic field, our atmosphere, our oceans, and life on Earth, could face the same terrible fate.

    Noel Fernandis

    ScienceNow

  • Science Round-up 2022

    Post COVID-19 pandemic as the countries across the globe were coming to terms with the new realities of life, scientists/researchers dedicatedly made incredible discoveries providing use deeper understanding of the secrets of universe by capture images of ancient galaxies, reviving the dead, developing synthetic embryo and capturing images of black hole. The year also saw some mazing technological breakthroughs like simulating the wormhole, successful nuclear fusion, fastest exascale supercomputer and new high-precision navigation system and revolutionary efforts to save humanity from rogue asteroids and make Sanskrit language to be more computer-enabled.

    As we look ahead at what’s going to come in 2023, we have shortlisted top 10 scientific discoveries and technological breakthroughs of the past year as follows… 

    Fastest Supercomputer:

    Hewlett Packard Enterprise’s Frontier, the world’s first exascale supercomputer crunches numbers with mind-blowing speed – 1.1 quintillion or 1018 calculations per second. As of June 2022, Frontier has emerged as the world’s fastest supercomputer with 2.5 times speed of the second ranking Japanese supercomputer – Fugaku. Frontier’s novel architecture is ideally suited for delivering unprecedented machine learning and data science and automations that could vastly improve our understanding of critical processes, from drug delivery to nuclear fusion to the global climate change.

    The James Webb Telescope:

    The Innovation of the year in aerospace technology, the James Webb Telescope (JWST) beamed down the first images in July, showing use jaw-dropping views of the cosmos. Unlike the Hubble space telescope, which scanned the heavens from low Earth orbit, the Webb telescope is camped hundreds of thousands of miles farther out, sitting in Earth’s shadow, where it is permanently blocked from sunlight. As a result, the $10 billion JWST can see deep into fields of forming stars. It can peer 13 billion years back in time at ancient galaxies, still in their nursery. It can teach us about how those stars and galaxies came together from primordial matter, something Hubble could only glimpse.

    Organ Transplant reviving the dead:

    A group of Yale scientists succeeded in reviving cells in the hearts, liver, kidneys and brains of pigs that had been lying dead in a lab for an hour. The researchers accomplished the feat by using a device much like a heart-lung machine to pump a custom-made solution, dubbed OrganEx, into the pigs’ bodies. The pigs’ hearts started beating and sent the solution through their veins. While the pigs weren’t revived, but their organs started functioning again. The researchers hope their breakthrough eventually will help increase the supply of human organs available for transplant by letting doctors get viable organs from bodies long after death. The technology also might be useful in limiting damage to hearts from heart attacks, and to brains from strokes.

    Synthetic embryo made without sperm or eggs:

    After 10 years of research, scientist at the Weizmann Institute of Science in Israel, created a synthetic mouse embryo that began forming organs without a sperm or egg inside a bioreactor. All it took was stem cells. It was the first time scientists ever managed to grow fully synthetic mouse embryos outside the womb. The mouse stem cells were grown into an artificial womb for eight days, where they developed a rudimentary brain, an intestinal tract and a beating heart. The experiment could be key in understanding how organs develop in the embryos and one-day help develop replacement organs for people who need a transplant. However, it also raises profound questions about whether other animals, including humans, might one day be cultured from stem cells in a lab.

    Deflecting Asteroid Collision:

    After 10 months flying in space, NASA’s Double Asteroid Redirection Test (DART) – the world’s first planetary defense technology mission has proved that it has the ability to deflect a giant space rock off a collision course with our planet. NASA sent the 1,100-pound DART spacecraft slamming into a 525-foot-diameter asteroid, Dimorphos, at 14,000 miles per hour to see whether the impact force would be enough to change its trajectory. Dimorphos, which didn’t actually threaten Earth, was orbiting around a larger parent asteroid, Didymos, every 11 hours and 55 minutes before the crash. After DART slammed into Dimorphos on Sept. 26, astronomers clocked its orbit time at 11 hours and 23 minutes, 32 minutes shorter than before, signaling a significant change in its path.

    New Navigation System with 10 centimeter accuracy:

    Researcher of Delft University, Vrije Universiteit Amsterdam and VSL have developed an alternative ‘positioning system’ that is more robust and accurate than the present GPS system and Galileo system. This new technology is important for the implementation of a wide range of advanced location-based applications, including autonomous vehicle, quantum communication and next-gen mobile communication system. For long, the existing positioning systems have been considered to be unreliable in the urban settings owing to their weak signals and inaccurate positioning because radio signals are reflected or blocked by buildings.

    Nuclear fusion:

    Scientists at the Lawrence Livermore National Laboratory in California achieved the long-elusive breakthrough in harnessing the process that fuels the sun. This milestone moves us one significant step closer to powering our society with zero-carbon fusion energy. Fusion involves pushing together two nuclei of a lightweight element at a colossal speed, forcing them to fuse. The leftover mass is converted into an enormous amount of energy, according to Einstein’s formula E = mc2. The nuclear fusion has the potential to produce limitless, carbon-free energy, displacing fossil fuels and other traditional energy sources. The achievement will pave way for in clean power technology, help tackle climate change and energy security.

    Ancient Grammatical Puzzle Solved After 2,500 Years:

    A grammatical problem that has defeated Sanskrit scholars since the 5th century BC has finally been solved by an Indian PhD student at St John’s College. Rishi Rajpopa made the breakthrough by decoding a rule taught by ‘the father of linguistics’, Paṇini. The discovery makes it possible to ‘derive’ any Sanskrit word – to construct millions of grammatically correct words including ‘mantra’ and ‘guru’ – using Panini’s revered ‘language machine’ which is widely considered to be one of the great intellectual achievements in history. Leading Sanskrit experts have described Rajpopat’s discovery as ‘revolutionary’ and it could now mean that Paṇini’s grammar can be taught to computers for the first time.

    Wormhole created using a Quantum Computer: W

    ormholes are a very common topic when it comes to science fiction. The proper definition of a wormhole is ‘a rupture in space and time’ which is regarded as a ‘bridge between two remote regions in the universe’. While they are not existent in physical space, a group of researchers of the California Institute of Technology claim that they have created the first-ever wormhole, a kind of tunnel theorized in 1935 by Albert Einstein and Nathan Rosen that leads from one place to another by passing into an extra dimension of space. The wormhole emerged like a hologram out of quantum bits of information, or “qubits,” stored in tiny superconducting circuits. By manipulating the qubits, the physicists then sent information through the wormhole.

    First images of black hole in our galaxy:

    Astronomers of the Event Horizon Telescope (EHT) Collaboration unveiled the first image of the supermassive black hole at the centre of our Milky Way galaxy. Although, one cannot see the black hole itself, because it is completely dark, glowing gas around reveals a telltale signature: a dark central region surrounded by a bright ring-like structure. The view also captures light bent by the powerful gravity of the black hole, which is four million times more massive than our Sun. The black hole is about 27,000 light-years away from the Earth, and it appears as a donut in the sky.

    -Team ScienceNow

  • This month that year

    January 3

    1967 — Harry Thomason received a patent for an apparatus for cooling and heating a house using solar energy.

     

    January 10

    1893 — Thomas Laine patented the electric gas lighter.

     

    January 14

    1890 — George Cooke received a patent for a gas burner.

     

    January 17

    1882 — Leroy Firman received a patent for the telephone switchboard.

     

    January 20

    1857 — William Kelly patented the blast furnace for manufacturing steel.

     

    January 21

    1954 — The first atomic submarine, the USS Nautilus, was launched. It was christened by First Lady Mamie Eisenhower.

     

    January 26

    1875 — The first electric dental drill was patented by George Green.

     

    January 27

    1880 — Patent was granted to Thomas A. Edison for “an electric lamp for giving light by incandescence.”

     

    January 29

    1924 — Carl Taylor of Cleveland patented a machine that made ice cream cones.

     

    January 31

    1851 — Gail Borden announced his invention of evaporated milk.

  • SKY Watch

    This star chart is for early  January 9 PM mid January  8 PM and end January 7 PM .

    To use this chart, hold the star chart vertically ,face any direction in the sky. Turn the star chart around so that the direction you are facing is at the bottom.

    Now, the stars shown at the bottom in the chart are the stars you will see in the sky . Dots represent stars. The larger the dot the brighter the star.

    Lines between stars are imaginary and aid location . Names of constellation are along each side 

    Monthly phases

    Full moon

    07 January 2023 04:38

    Last quarter

    15 January 2023 07:40

    New moon

    22 January 2023 02:23

    First quarter

    28 January 2023 20:49

       

     

    Mr Suhas Naik-Satam

    Nehru Planeterium

  • Do You Know?

    Do You Know?

    Know the Science behind day to day incidences…

    Why is Water clear?

    Water is entirely composed of hydrogen and oxygen. Both elements are gases in nature and are

    invisible. Being composed of such elusive and invisible elements is certainly a large reason why water has that crystal-clear appearance. However, any discoloration that may appear in water from a natural source such as a river, lake or underground streams such as a well is largely due to natural substances such as algae, leaves, dirt and numerous other particles typically brought in by rainwater.

    Why is Air invisible?

    Air is a mixture of gases, mainly nitrogen and oxygen with small molecules (particles) that are far apart.Wavelengths of light may pass by these molecules without hitting them. When they do bump a

    molecule, it absorbs some colour and scatters some, spreading it out in all directions. But this is too

    little to reach our eyes for us to notice, thus making air appear invisible.

    Why do distant Objects look smaller?

    The easiest way to understand this is by thinking about something called your field of view. This is how much you can see, without turning your head. When things are closer to you, they take up more of your field of view, so they seem bigger. When they’re further away, they take up less of your field of view, and so seem smaller.

    Why are vehicle Taillights usually coloured red?

    Functionally red light has less effect on human low light vision than any other visible colour. Red tail

    and brake lights are highly recognisable to the Rod cells in our eyes, while higher wavelength colours like green or blue are harder to distinguish.

    -Team ScienceNow

  • Believe it or not

    Believe it or Not…

    Let’s know some incredible facts… unbelievably true…

    • You are taller in the morning than you are at night! The reason being when you sleep, your spine is no longer subjected to the pressures of gravity.
    • Scientists can locate colonies of penguins from space just by looking for dark ice patches of penguin poop!
    • After a year in space, astronaut Scott Kellys genetic makeup changed so drastically that his

    DNA no longer matches his twin brother!

    • Albert Einstein’s eyes are in a safe deposit box in New York city!
    • Firefighters in Dubai tackle blazes in high-rise buildings and bridges wearing jetpacks!
    • The US Military is developing Robotic Horses to carry heavy equipment into battle!
    • Solar flare explosions of energy on the surface of the sun can be 100,000 times more powerful than all the nuclear weapons on Earth!

    -Team ScienceNow

  • This Month.. That Year….

    This Month.. That Year….

    December 1571:

    German astronomer Johann Kepler discovered elliptical orbits.

    December 1621:

    Galileo perfected his invention of the telescope.

    December 1743:

    German chemist Martin H. Klaproth discovered uranium.

    December 1773:

    George Cayley founded the science of aerodynamics and invented gliders.

    December 1792:

    English inventor Charles Babbage invented the calculating machine.

    December 1813:

    Irish chemist and physicist Thomas Andrews discovered the ozone.

    December 1818:

    Physicist James Prescott Joule discovered the principle of conservation of energy.

    December 1852:

    Scientist Antoine Henri Becquerel discovered radioactivity and won the Nobel Prize in 1903.

    December 1856:

    English physicist Joseph John Thomson discovered the electron and won the Nobel Prize in 1906.

    December 1879:

    Thomas Edison patented a magnetoelectric machine.

    December 1906:

    Peter Carl Goldmark developed colour TV and LP records.

    December 1924:

    John Backus invented FORTRAN, a computer language.

    December 1952:

    Larry Bartlett invented a photographic printer

    -Team ScienceNow

  • Star Watch

    This star chart is for early  December 9 pm mid December 8 pm and end December 7 pm .

    To use this chart, hold the star chart vertically ,face any direction in the sky. Turn the star chart around so that the direction you are facing is at the bottom.

    Now, the stars shown at the bottom in the chart are the stars you will see in the sky .

    Dots represent stars. The larger the dot the brighter the star.

    Lines between stars are imaginary and aid location .

    Names of constellation are along each side each constellation

    Monthly phases

      Full moon

    08 December 2022 09:38

    Last quarter

    16 December 2022 14:26

    New moon

    23 December 2022 15:47

    First quarter

    30 December 2022 06:51

    Full moon

    07 January 2023 04:38 

     

    Suhas Naik-Satam

    Nehru Planetarium

  • Do you Know… Try to understand some facts in science….

    Why do chillies burn even though they are cold?

    Chillies contain capsaicin, which makes the receptors in our mouth feel that there is something really hot. Capsaicin affects receptors everywhere, so we normally feel the heat again throughout. The degree of heat found within a food is often measured on the Scoville scale.

    Why Is the Sunset Red or Orange?

    The sunset appears reddish because while the sun is setting, the light that reaches us goes through different atmospheric layers when the sun is overhead. Hence, the only coloured light that is not scattered away is reddish which is a long wavelength light.

    Why Does the Moon Appear in the Daytime?

     The moon does not produce its own light. We see the moonlight when the sun’s light is reflected off its surface. The visibility of the moon’s light also depends on its angle and its distance from Earth. When the moon and sun are on the same side of the Earth, it makes the moon 1,00,000 times brighter than the brightest star in the sky, thus making it visible during the day.

    Why is a rainbow curved?

    A rainbow is curved because it reflects the round shape of the sun. On Earth, part of the sun is blocked. This makes rainbows appear as a half or a quarter circle. But when we are in an airplane, we often see the rainbow below and it might appear as a full circle.

    Why is the Sun the only star that can be seen during the day?

    Stars often glow during the day. But because of their brightness and closeness of the sun, they are impossible to see. Also, the light coming from the sun is scattered into the bright blue colour of the sky. This bluish atmosphere blocks out the stars which shine very faintly. On the other hand, if we see the Earth’s atmosphere from above the moon, we could see the stars appear both during the day and night.

    Team ScienceNow Digital

  • What if … If THERE WAS NO GRAVITY?

    Gravity is basically a force of attraction between any two atoms. It is an attraction that keeps us on Earth, and keeps Earth orbiting the Sun. Biologically, the atoms in our body also exert gravity so as to keep the organs functioning….

    What does gravity do?

    The gravity on Earth is because of the mass of the Earth which is made up of gigantic number of atoms held together. So, gravity is what keeps us in place. It is also why planetary bodies are in motion rotating in a certain orbit around the sun and is the basic strength behind the formation of new planets and stars. Gravity also holds many things down on Earth – people, vehicles, furniture and almost everything.

    What will happen if there is no gravity?

    If there was no gravity on the planet, everything would just start floating around. Without gravity, the water in the oceans, rivers and lakes would disappear, leaving Earth with no water supply. Without gravity, the air in the atmosphere has no reason to hang around and it would vanish into space. No one would last if the planet didn’t have gravity. If gravity vanishes, it would feel as though the ground beneath us is falling out and leaving us floating upwards in slow motion. On Earth, our body has adapted to pushing against the force of gravity which constantly pulls us down. Lack of gravity would lead to drastic changes in body temperature, breathing, pulse rate, bone displacement muscle tension and blood pressure. This physical tension is termed as Zero Gravity. This makes the gravitational force very significant and a true constant in our lives.

    Do you know…

    Astronauts lose at least 14% of their bone strength during a six month stay on a space station

    WHAT IF THIS GRAVITATIONAL FORCE INCREASES?

    if gravity were to suddenly double, it would be almost as bad as everything would be twice as heavy. There would be big problems with anything structural. Houses, bridges, skyscrapers, table legs, support columns and so on are all sized for normal gravity. Most structures would collapse fairly quickly if you doubled the load on them. Trees and plants would have problems. Power lines would have problems. The air pressure would double and that would have a big effect on the weather.

    Team ScienceNow Digital