A large region of cosmic space without galaxies. The first of these voids to be discovered lies in the direction of Bootes and is some 300 million light-years across. It is estimated that voids take u
p about 98% of the volume of the Universe, with clusters of galaxies concentrated in the thin walls that surround them.
A large region of cosmic space without galaxies. The first of these voids to be discovered lies in the direction of Bootes and is some 300 million light-years across. It is estimated that voids take u
p about 98% of the volume of the Universe, with clusters of galaxies concentrated in the thin walls that surround them.
A large region of cosmic space without galaxies. The first of these voids to be discovered lies in the direction of Bootes and is some 300 million light-years across. It is estimated that voids take u
p about 98% of the volume of the Universe, with clusters of galaxies concentrated in the thin walls that surround them.
Island arcs that develop along the edges of a continent (for example, large parts of the Andes/ Central American/ Canadian mountain chain) may be known as a volcanic arc or volcanic chain. [Wikipedia]
Moderate to violent ejection of solid or very viscous hot fragments of new lava in short-lived, cannon-like bursts. Ash and fine ash are emitted with gases and ascend to form a cauliflower-like erupti
on cloud.
A volcanic field is a spot of the earth's crust that is prone to localized volcanic activity. They usually contain 10 to 100 volcanoes, such as cinder cones and are usually in clusters. Lava flows may
also occur. They may occur as a monogenetic volcanic field or a polygenetic volcanic field. [Wikipedia]