The apparent shape of a background source undergoing the effect of gravitational lensing as seen from Earth, provided that the source, the intervening lens, and the observer are in perfect alignment t
hrough Einstein radius.
The apparent shape of a background source undergoing the effect of gravitational lensing as seen from Earth, provided that the source, the intervening lens, and the observer are in perfect alignment t
hrough Einstein radius.
A cosmological model in which a static (neither expanding nor collapsing) Universe is maintained by introducing a cosmological repulsion force (in the form of the cosmological constant) to counterbala
nce the gravitational force.
Extreme ultraviolet Imaging Telescope. Instrument on the SOlar Heliospheric Observer. EIT continuously observes the full disk Sun at 17.1 nm, 19.5 nm, 28.4 nm, and 30.4 nm.
A wave in the corona of the Sun which produceshock waves on the Sun's chromosphere (Moreton Waves). EIT Waves areproduced by large solar flare and expand outward at about 1,000 km/s. Itusually appears
as a slowly moving diffuse arc of brightening in H-alpha,and may travel for several hundred thousand km.
A wave in the corona of the Sun which produce shock waves on the Sun's chromosphere (Moreton Waves). EIT Waves are produced by large solar flare and expand outward at about 1,000 km/s. It usually appe
ars as a slowly moving diffuse arc of brightening in H-alpha, and may travel for several hundred thousand km. (spase)
A wave in the corona of the Sun which produce shock waves on the Sun's chromosphere (Moreton Waves). EIT Waves are produced by large solar flare and expand outward at about 1,000 km/s. It usually appe
ars as a slowly moving diffuse arc of brightening in H-alpha, and may travel for several hundred thousand km. (spase)
In volcanology, particles that came out of a volcanic vent, traveled through the air or under water, and fell back on the ground surface or on the ocean floor. [Wikipedia]