How are magnetic clouds formed?
Large geomagnetic storms are usually caused by a structure in the solar wind having specific features – a long duration, strong southward interplanetary magnetic fields (IMF) impinging on the earth’s magnetosphere.
Do clouds have magnetic fields?
In organized motion of charged particles that is when there is net movement of charge in a preferential direction, for example a cloud with charged droplets moving under influence of wind one can have net magnetic field.
What do you call a galactic cloud?
An interstellar cloud is generally an accumulation of gas, plasma, and dust in our and other galaxies. An interstellar cloud is formed by the gas and dust particles from a red giant in its later life.
What do Magellanic Clouds look like?
The Large Magellanic Cloud and its neighbour and relative, the Small Magellanic Cloud, are conspicuous objects in the southern hemisphere, looking like separated pieces of the Milky Way to the naked eye. One recent estimate of the total mass of the LMC is about 1/10 that of the Milky Way.
What are plasma clouds?
< Plasmas/Plasma objects. A coronal cloud is a cloud, or cloud-like, natural astronomical entity, composed of plasmas and usually associated with a star or other astronomical object where the temperature is such that X-rays are emitted.
What is the Milky Way cloud?
Milky Way Galaxy, large spiral system consisting of several hundred billion stars, one of which is the Sun. It takes its name from the Milky Way, the irregular luminous band of stars and gas clouds that stretches across the sky as seen from Earth.
Can you see the Magellanic Cloud with the naked eye?
Apart from Andromeda you can also see the Large and Small Magellanic Clouds in the Southern Hemisphere, the Magellanic clouds are naked eye (dwarf) galaxies that orbits the Milky Way Galaxy.
Can you see the Magellanic Clouds with naked eye?
The Magellanic Clouds are visible to the unaided eye in the Southern Hemisphere, but they cannot be observed from most northern latitudes. The LMC is about 160,000 light-years from Earth, and the SMC lies 190,000 light-years away.
What does a molecular cloud do?
A molecular cloud, sometimes called a stellar nursery (if star formation is occurring within), is a type of interstellar cloud, the density and size of which permit absorption nebulae, the formation of molecules (most commonly molecular hydrogen, H2), and the formation of H II regions.
Why do molecular clouds exist?
A molecular cloud is an accumulation of interstellar gas and dust. Such a density can only occur if the temperatures are very low, otherwise the thermal pressure of the gas would lead to an expansion of the dark nebula and no new stars would be able to form.
Is cloud a plasma?
a cloud, or cloud-like, natural astronomical entity, composed of plasmas at least hot enough to emit X-rays is called a coronal cloud.
What kind of event is a magnetic cloud?
Magnetic cloud. A magnetic cloud is a transient event observed in the solar wind. It was defined in 1981 by Burlaga et al. 1981 as a region of enhanced magnetic field strength, smooth rotation of the magnetic field vector, and low proton temperature. Magnetic clouds are a possible manifestation of a coronal mass ejection (CME).
How many ejecta are there in a magnetic cloud?
Magnetic clouds represent about one third of ejecta observed by satellites at Earth. Other types of ejecta are multiple-magnetic cloud events (a single structure with multiple subclouds distinguishable) and complex ejecta, which can be the result of the interaction of multiple CMEs.
How are magnetic clouds and CMEs related to each other?
The association between CMEs and magnetic clouds was made by Burlaga et al. in 1982 when a magnetic cloud was observed by Helios-1 two days after being observed by SMM. However, because observations near Earth are usually done by a single spacecraft, many CMEs are not seen as being associated with magnetic clouds.
How long does it take a magnetic cloud to move past a satellite?
The typical time for a magnetic cloud to move past a satellite at the L1 point is 1 day corresponding to a radius of 0.15 AU with a typical speed of 450 km/s (280 mi/s) and magnetic field strength of 20 nT.