Do they also have magnetic fields to protect emerging life? A new analysis looks at one type of exoplanet – super-Earths up to five times the size of our own planet – and concludes that they probably do have a magnetic field, but one generated in a totally novel way: by the planets...
We can consider the gravitational attraction exerted by the other planets to be negligible, therefore the greatest effects on the Earth will be those produced by the sun and the moon. These three bodies attract each other, however, the greatest effect is in the Earth-moon interaction. Both ...
Just as you would not see the true greens of the grass in a moonlit field as you walk through at night, the northern lights, especially weak displays, appear muchless vivid than the photos would have you think(see figure 12). Don’t get me wrong, if the display is strong you will ...
Many galaxies like ours don't have AGNs, which are powered by feeding supermassive black holes, but even those that do are not necessarily blasting out radiowaves or "radio loud." It is only these AGNs that are defined as radio galaxies. What fuels "radio loud" active galactic nuclei?
The doomsday has changed this rule. If human beings have developed intointerstellarcivilization, they can only emigrate to other planets when they are overcrowded. If the aborigines of the colonized planet don't want to, then something like Avatar will happen. If human beings have not developed ...
a large hole makes the image bright, but fuzzy, and a small one makes it dim but sharp. Darken the room as much as possible. Be sure to try this out beforehand to make sure the mirror's optical quality is good enough to project a clean, round image. Of course, don't let anyone ...
But we don't yet know what the dark matter is made of. Does dark matter have mass? If dark matter exists, it must have mass. Massless dark matter would not behave in ways that solve the problems that dark matter addresses. What does dark matter do?