Start Searching the Answers
The Internet has many places to ask questions about anything imaginable and find past answers on almost everything.
Satellites in circular orbit If its speed is too high, the satellite will break free of Earth’s gravity and escape. If it is too low, it will fall back to Earth. When a satellite is in circular orbit, gravity is the only force acting on it, which means that the centripetal force and gravity must be equal: Fc = Fg .
Centripetal forces cause centripetal accelerations. In the special case of the Earth’s circular motion around the Sun – or any satellite’s circular motion around any celestial body – the centripetal force causing the motion is the result of the gravitational attraction between them.
|Name||Gravity m/s²||Jump height metres|
Although you can jump very high on the moon, you’ll be happy to know that there’s no need to worry about jumping all the way off into space. In fact, you’d need to be going very fast – more than 2 kilometres per second – to escape from the moon’s surface./span>
You can, but it’s about the difference in gravitational pull on you and the earth. Because of that, you can jump higher during the day and during the night then you can during the morning and evening. The main force on you when standing on Earth is the force of Earth’s gravity./span>
You could jump off of any of them. Asteroids come in all sizes. The largest—Vesta—has an escape velocity of 360 meters per second, more than ten times faster than a person can jump. But most are tiny.
So a human could easily hop the 1.5-km span from 5381 Sekhmet to its moon and back, since both bodies are 1 km or less in size. The astronaut might even jump from 243 Ida’s tiny moon, Dactyl, all the way to Ida itself, 90 km away — taking care not to miss!
6 Answers. Wikipedia gives 0.51kms or 510ms escape velocity, so, no, no leaving Ceres by jumping. Following my earlier calculations, an asteroid of the radius of Ceres would have orbital speed at near-surface orbit of about 336ms, which is way beyond jump strength of anyone as well.
With a very low gravity, an asteroid is not really friendly to the walking visitor. Any movement may send the walker back to orbit. Considering the schedule — NASA could launch a mission as soon as 2025, — a solution will need to be validated by less than 10 years.
Asteroids, including those in the asteroid belt have been suggested as a possible site of human colonization. The process of colonizing asteroids does have many obstacles that must be overcome for human habitation, including transportation distance, lack of gravity, temperature, radiation, and psychological issues.
During walking on Earth, at 1.0 g of gravity, the work done by the muscles to maintain the motion of the centre of mass of the body (Wext) is reduced by a pendulum-like exchange between gravitational potential energy and kinetic energy.
The reason behind this is simple: Comets aren’t terribly big—67P is roughly four kilometers across and has a mass considerably less than a typical Rocky Mountain. This makes the force of gravity on the comet pretty weak, barely enough to hold it together./span>
Comets do not melt in the strict sense of becoming liquid. However, since they are composed partly of ice and other volatile compounds, they vaporize (turn directly to gas) when warmed in the vacuum of space by passing near the sun. It is this escaping gas that forms the comet’s luminous tail./span>
These comets leave trails of gas and dust behind them. The trailing dust becomes meteors, and as these crash into the thin air of the Earth’s atmosphere the dust burns up. These bright streaks of light across the night sky are known as shooting stars. Meteors are commonly called falling stars or shooting stars.
When a comet gets warm enough, it creates an extended, gas-rich cloud known as a coma around its nucleus. If the coma contains carbon-nitrogen and carbon-carbon bonds, the Sun’s ultraviolet light will excite the electrons inside it, causing them to emit a green glow when they drop down in energy./span>
There are two categories of comet, based on the amount of time they take to orbit the Sun. Short-period comets take less than 200 years, and long-period comets take over 200 years, with some taking 100,000 to 1 million years to orbit the Sun.
While the dust tails of comets shine by reflected sunlight and are therefore yellow in colour, the gas tails shine through fluorescence.
Colours of meteors depend on the relative influence of the metallic content of the meteoroid versus the superheated air plasma, which its passage engenders: Orange-yellow (sodium) Yellow (iron) Blue-green (magnesium)
The Leonids meteor shower is sending bright green shooting stars across the night sky this week. As the rocks collide with our atmosphere, they burn up in streaks — also known as shooting stars. Because the metals are rich in iron and magnesium, the Leonids often leave bright green tails in their wake./span>
This spot is called the radiant point, or simply the radiant. Meteor showers are named after the constellation in which their radiant appears./span>
These colors are predictable: first red, then white, and finally blue. If the meteor (shooting star) is large enough to survive the fall through the atmosphere, it cools and doesn’t emit any visible light at all. A green glow, clearly visible in the trail of this shooting star, indicates the presence of burning copper./span>