Ask Question. Asked 7 years, 2 months ago. Active 11 months ago. Viewed 6k times. Improve this question. Jerard Puckett 7, 2 2 gold badges 32 32 silver badges 78 78 bronze badges. SpringLearner SpringLearner 2, 1 1 gold badge 16 16 silver badges 25 25 bronze badges. Is there any advantage to remaining suspended in one place that's worth the thrust?
At 1 light year out you'd be moving. Further and you'd likely fall into the influence of another star and start moving faster wrt our sun. Unless you're moving straight from the sun along a radial vector. In which case your path would be a degenerate conic section. Then you could turn towards the Sun and thrust very lightly actually, a mere 0. The latter is not a big problem; ion drives can provide that for months if not years. The former I'm not sure if there is a single craft which has ever achieved that delta-V.
Show 5 more comments. Active Oldest Votes. Improve this answer. James Jenkins James Jenkins It makes flowers and plants grow. It even gives us vitamin D so we can better absorb calcium into our bodies for strong bones. It does all these things by sending down light, which includes invisible ultraviolet say: ul-trah-VYE-uh-lit rays.
These are also called UV rays. Some ultraviolet rays pass through air and clouds and reach the skin. When your skin's been exposed to too many of these rays, you get what's known as a sunburn. Some people get a sunburn faster than others because of their coloring. If you have blond or red hair, light-colored skin, and light-colored eyes, you'll tend to get a sunburn more quickly than someone with dark eyes and skin.
That's because you have less melanin say: MEL-uh-nun. Melanin is a chemical in the skin that protects it from sun damage by reflecting and absorbing UV rays. People with darker skin have more melanin, but even if you have dark hair, dark eyes, or darker-toned skin, you can still get a sunburn.
It will just take a little bit longer. Sunburns look bad and feel worse. They can cause blisters on your skin. They can keep you inside feeling sore when everyone else is outside having fun. They increase your chance of getting wrinkly when you get older. And worst of all, they can lead to skin cancer when you are an adult. A small part of this falls upon Earth and makes our planet habitable.
The temperature at the surface is nearly 6, degrees Centigrade. The gases move at thousands of miles an hour. You can't stand on the surface of the Sun even if you could protect yourself. The Sun is a huge ball of heated gas with no solid surface.
The Sun's surface is always moving. Sometimes storms bigger than the size of Earth can send gas and energy flowing into space. Watch a Prominence Movie. These convection cells can be seen as solar granules that are several thousand miles across, and change shape within a few minutes. You can see the same kind of motion by looking at the water in a boiling pot of water. This convection motion produces many phenomena on the surface, because as the gases flow, they produce electrical currents that generate powerful magnetic fields.
Intense concentrations of magnetic energy cause sunspots to form - dark spots on the solar surface that are many times larger than Earth. Login or Register Customer Service. RISE —. PHASE —. Tonight's Sky — Change location. US state, Canadian province, or country. Tonight's Sky — Select location. Tonight's Sky — Enter coordinates. UTC Offset:. Picture of the Day Image Galleries. Watch : Mining the Moon for rocket fuel.
Queen guitarist Brian May and David Eicher launch new astronomy book.
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