Astronomy Picture of the Day

The Einstein Cross Gravitational Lens
Image Credit & License: NSF, NOIRLab, AURA, WIYN; Processing: J. Rhoads (Arizona State U.) et al.
Explanation: Most galaxies have a single nucleus -- does this galaxy have four? The strange answer leads astronomers to conclude that the nucleus of the surrounding galaxy is not even visible in this image. The central cloverleaf is rather light emitted from a background quasar. The gravitational field of the visible foreground galaxy breaks light from this distant quasar into four distinct images. The quasar must be properly aligned behind the center of a massive galaxy for a mirage like this to be evident. The general effect is known as gravitational lensing, and this specific case is known as the Einstein Cross. Stranger still, the images of the Einstein Cross vary in relative brightness, enhanced occasionally by the additional gravitational microlensing effect of specific stars in the foreground galaxy.

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Praise and Gratitude be to Allah, The Lord of All Worlds. And Prayers and peace and greetings upon the most noble of the prophets and messengers Mohammad (sala lah alyh w aleh): Allah says in the Holy Koran (It is He who made the sun a shining light and the moon a derived light and determined for it phases - that you may know the number of years and account) ). Muslims has taken care of astronomy wide attention because of the close relationship of this science in the care of worship , including: knowledge of the time and direction of Qibla , especially after the overlap of Islamic civilization with other civilizations in the first era of Islam were Muslims gives scrutiny of things, and checked the things.

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