The sun is essentially a massive liquid magnet. Heliophysicists gauge our star’s activity by tallying the number of sunspots—relatively “cold” knots of its magnetic field that are often the source of radiation and plasma outbursts—on its surface. (Scientists monitor this tally in real time...
These particles are called plasma,and the stream of plasma coming from the Sun is called the solar wind. The more active the Sun,the stronger the solar wind.The solar wind constantly streams toward the Earth,but don't worry because a protective magnetic field surrounds our planet.The same ma...
The solar wind is a plasma flowing out permanently from the Sun. It fills up the region called the heliosphere, which surrounds the Sun and expands to a huge distance where its outer boundary interacts with the interstellar medium. Important phenomena within the heliosphere are solar wind ...
A halo is a large, dim, region that surrounds the entire galaxy. It's made of hot gas and possibly dark matter. Gravity All of these components orbit the nucleus and are held together by gravity. Because gravity depends upon mass, you might think that most of a galaxy's mass ...
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wind. In one, the solar wind travels directly outward from our star, pulling the magnetic field from the Sun into the heliosphere, the bubble that surrounds our solar system. The other type of solar wind forms from magnetic field lines that are initially closed, like a loop, but then open...
The goal is to detect the particles that constitute the mas- sive halo of dark matter that surrounds the Milky Way as they pass through our detectors at rates of a few per second per square metre4. Because they interact so weakly, it takes a huge effort to capture them. If we are ...
The expanded, highly vascularized oviduct (sometimes, incorrectly, termed a uterus) contains the pups; the fluid within the oviduct (that surrounds the pups) is exchanged with seawater during the last months of gestation, so the pup presumably can osmoregulate like an adult during this period. ...
The Sun is a hot ball of gas made of hydrogen. Most of its gas is in the fourth state of matter known as plasma, where the gas heats up to the point where atoms break up into plasma. The Sun’s plasma is so hot that it escapes the Sun’s gravitational field. This escape of pla...
T. brucei has a single flagellum that is present throughout the parasite and its life cycle. The flagellum has conserved and unique features. It emerges from a membrane invagination at the posterior end of the cell and remains attached to the cell body for most of its length. The flagellum...