Satellite ELSA-d to Clean up Space Debris
ELSA-d is the world’s first commercial mission that will demonstrate technologies for space debris docking and removal.
ELSA-d's servicer satellite has been developed to safely remove debris objects from orbit, equipped with proximity rendezvous technologies and a magnetic docking mechanism.
ELSA-d consists of two satellites stacked together -- one is a servicer designed to safely remove debris from orbit and the other a client satellite that will serve as a piece of replica or mock debris.
ELSA-d is the world’s first commercial mission that will demonstrate technologies for space debris docking and removal.
ELSA-d's servicer satellite has been developed to safely remove debris objects from orbit, equipped with proximity rendezvous technologies and a magnetic docking mechanism.
ELSA-d consists of two satellites stacked together -- one is a servicer designed to safely remove debris from orbit and the other a client satellite that will serve as a piece of replica or mock debris.
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SATURN'S TILT
A team of researcher reported that Saturn’s axial tilt is caused by the gravitational pull of Saturn’s moons as they migrate away from their host planet.
Saturn is the sixth planet from the Sun and the second largest planet in our solar system and is made mostly of hydrogen and helium.
Its axis is tilted by 26.73 degrees with respect to its orbit around the Sun, which is similar to Earth's 23.5-degree tilt.
Saturn is the planets with most moons. Titan is the largest moon of Saturn and the second-largest natural satellite in the Solar System.
(Jupiter's moon Ganymede is largest.)
A team of researcher reported that Saturn’s axial tilt is caused by the gravitational pull of Saturn’s moons as they migrate away from their host planet.
Saturn is the sixth planet from the Sun and the second largest planet in our solar system and is made mostly of hydrogen and helium.
Its axis is tilted by 26.73 degrees with respect to its orbit around the Sun, which is similar to Earth's 23.5-degree tilt.
Saturn is the planets with most moons. Titan is the largest moon of Saturn and the second-largest natural satellite in the Solar System.
(Jupiter's moon Ganymede is largest.)
PLANTS GENERATING MAGNETIC FIELD
• A recent study by scientific from Germany found that the Venus Flytrap (Dionaea muscipula) plant is capable of generating small magnetic fields.
• These plants send electrical signals to trigger the closure of their traps, to catch an insect, a biomagnetism phenomenon was observed. While leaf stalk, or petiole, is not excitable and is electrically insulated from the trap.
• Magnetic signals in plants are very weak and it was extremely difficult to measure, while using new and advanced atomic magnetometers it is measured at amplitude of up to 0.5 picotesla, which is millions of times weaker than the Earth's magnetic field.
• Scientists hope that this can help in identifying how the plant responds to sudden temperature changes, chemicals, and pest attacks
• A recent study by scientific from Germany found that the Venus Flytrap (Dionaea muscipula) plant is capable of generating small magnetic fields.
• These plants send electrical signals to trigger the closure of their traps, to catch an insect, a biomagnetism phenomenon was observed. While leaf stalk, or petiole, is not excitable and is electrically insulated from the trap.
• Magnetic signals in plants are very weak and it was extremely difficult to measure, while using new and advanced atomic magnetometers it is measured at amplitude of up to 0.5 picotesla, which is millions of times weaker than the Earth's magnetic field.
• Scientists hope that this can help in identifying how the plant responds to sudden temperature changes, chemicals, and pest attacks
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Why is mercury used in thermometer?
Mercury is the only metal which is in liquid state even at the ordinary room temperature. Also, it uniformly expands when heated and does not stick to the walls of thermometer. Its high boiling point and low freezing point is the main reason for using it in ordinary thermometers.
Mercury is the only metal which is in liquid state even at the ordinary room temperature. Also, it uniformly expands when heated and does not stick to the walls of thermometer. Its high boiling point and low freezing point is the main reason for using it in ordinary thermometers.
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Since gravity is unlimited, can we use it as an infinite energy source?
No, gravity can not be used as an infinite energy source. In fact, strictly speaking, gravity itself can not be used as an energy source at all. You are confusing forces with energy, which are very different things.
Energy is a property of objects, such as balls, atoms, light beams, or batteries. In contrast, forces describe the interaction between objects. Forces are the way that energy is transferred from one object to another when they interact, but forces are not the energy itself. Gravity is a force, so it just provides one way for objects to exchange and transform energy to different states.
No, gravity can not be used as an infinite energy source. In fact, strictly speaking, gravity itself can not be used as an energy source at all. You are confusing forces with energy, which are very different things.
Energy is a property of objects, such as balls, atoms, light beams, or batteries. In contrast, forces describe the interaction between objects. Forces are the way that energy is transferred from one object to another when they interact, but forces are not the energy itself. Gravity is a force, so it just provides one way for objects to exchange and transform energy to different states.
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Can a star turn into a planet?
Yes, a star can turn into a planet, but this transformation only happens for a very particular type of star known as a brown dwarf.
Some scientists do not consider brown dwarfs to be true stars because they do not have enough mass to ignite the nuclear fusion of ordinary hydrogen.
At the same time, some scientists do not consider brown dwarfs to be true planets either because they typically sit at the center of a solar system, just like a star.
Yes, a star can turn into a planet, but this transformation only happens for a very particular type of star known as a brown dwarf.
Some scientists do not consider brown dwarfs to be true stars because they do not have enough mass to ignite the nuclear fusion of ordinary hydrogen.
At the same time, some scientists do not consider brown dwarfs to be true planets either because they typically sit at the center of a solar system, just like a star.
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What keeps space empty?
Space is not empty. A point in outer space is filled with gas, dust, a wind of charged particles from the stars, light from stars, cosmic rays, radiation left over from the Big Bang, gravity, electric and magnetic fields, and neutrinos from nuclear reactions.
As the book "Nothingness: The Science of Empty Space" by Dr. Henning Genz describes, space is also filled with two things we can't directly detect: dark matter and dark energy.
Even if all these things could be removed and blocked out from a certain region of space, there would still be three things we could never remove according to Dr. Genz: (1) vacuum energy, (2) the Higgs field, and (3) spacetime curvature.
Space is not empty. A point in outer space is filled with gas, dust, a wind of charged particles from the stars, light from stars, cosmic rays, radiation left over from the Big Bang, gravity, electric and magnetic fields, and neutrinos from nuclear reactions.
As the book "Nothingness: The Science of Empty Space" by Dr. Henning Genz describes, space is also filled with two things we can't directly detect: dark matter and dark energy.
Even if all these things could be removed and blocked out from a certain region of space, there would still be three things we could never remove according to Dr. Genz: (1) vacuum energy, (2) the Higgs field, and (3) spacetime curvature.
Can wind travel faster than the speed of sound?
Yes, wind can travel faster than the speed of sound. Wind is just the bulk movement of a mass of air through space and is in principle no different from a train speeding along or a comet zipping through space. The only limitation on the bulk motion of objects with mass is the universal speed limit of the speed of light in vacuum.
The speed of sound is not a fundamental speed like the speed of light is. The speed of sound just describes how fast a mechanical wave travels through a material.
Yes, wind can travel faster than the speed of sound. Wind is just the bulk movement of a mass of air through space and is in principle no different from a train speeding along or a comet zipping through space. The only limitation on the bulk motion of objects with mass is the universal speed limit of the speed of light in vacuum.
The speed of sound is not a fundamental speed like the speed of light is. The speed of sound just describes how fast a mechanical wave travels through a material.
Can gravity form waves?
Yes, gravity can forms waves. Gravitational waves are ripples in spacetime that travel through the universe.
If you think of gravity as a force acting at a distance, it is difficult to visualize how gravitational waves could form. However, if you use the more accurate description of gravity that was developed by Einstein in his general theory of relativity, these concepts become more logical.
Yes, gravity can forms waves. Gravitational waves are ripples in spacetime that travel through the universe.
If you think of gravity as a force acting at a distance, it is difficult to visualize how gravitational waves could form. However, if you use the more accurate description of gravity that was developed by Einstein in his general theory of relativity, these concepts become more logical.
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