The crust along a divergent boundary is some of the newest crust on earth. Explain why. Mountain roads are curved and not straight up the slope, why? What caused the collapse of the solar nebula? What evidence convinced Wegener and peers that in the past, land was one supercontinent and m...
The protostar is basically a baby star, and grows into a star through its life cycle in the same way as we are born and grow.The main process of all stars' birth is called Nuclear Fusion. Nuclear Fusion happens in very large clouds on gas called nebula. When nuclear fusion starts in ...
Define the terms:Galaxy,nebula,black hole,supernova,comet,asteroid,meteorite(这题必须用英文答)How and when is earth thought to have formed?Do the magnetic poles of the earth change?How do we know?What is "space weather',and how are we on earth protected from it?How are insolation and ...
How was Ceres formed? What process formed the planets by collisions of planetesimals accretion? How are planetary nebula formed? How are comets in the Kuiper belt formed? How are asteroids formed in space? Did Jovian or terrestrial planets form first? Why do Jovian planets and terrestrial planets...
You’re here because you want to learn how to grow weed indoors and are interested in a free “online class” about growing marijuana. Despite what you may have heard, growing your own cannabis is actually pretty easy once you have the right information. Anyone with the will to grow, a ...
tails. The orbit of a main-belt comet, however, is much different from that of a regular comet, which usually circles the sun in a tilted, highly elliptical fashion like a stretched-out rubber band. Instead, a main-belt comet travels a fairly circular, level orbit, much like an asteroid...
by Nebula Haze To “lollipop” a growing cannabis plant means to remove most growth from the bottom of the plant that isn’t getting light. With lollipopping, the cannabis grower leaves the top of the plant untouched, so it’s full on top and bare on bottom, like a lollipop. The lolli...
The reason that argonium can exist in the Crab Nebula is that electrically-charged cosmic rays passing through space strip argon atoms of an electron, allowing it to bond with hydrogen. Researchers also discovered that argonium is created from a different isotope of argon than the one in Earth...
The Death of a Star Hubble Space Telescope photograph of the Rotten Egg planetary nebula Photo courtesy of NASA/Space Telescope Science Institute Several billion years after its life starts, a star will die. How the star dies, however, depends on what type of star it is. ...
Most of the debris from the solar nebula has been swept up or ejected from the system, major impacts becoming infrequent after the end of the so-called ‘late heavy bombardment’ that formed the lunar impact basins some 3.8Gyr ago. Nevertheless, the risk of a significant impact persists (...