عشق

 

 http://welovestyles.com/quotes-on-love/

Supermassive black hole

From Wikipedia, the free encyclopedia

This article is about the astronomical object. For the song by Muse, see Supermassive Black Hole (song).

A gas cloud with several times the mass of the Earth is accelerating towards a supermassive black hole at the centre of the Milky Way.

Top: artist's conception of a supermassive black hole tearing apart a star. Bottom: images believed to show a supermassive black hole devouring a star in galaxy RX J1242-11. Left: X-ray image, Right: optical image.^[1]

A supermassive black hole is the largest type of black hole in a galaxy, on the order of hundreds of thousands to billions of solar masses. Most, and possibly all galaxies, including the Milky Way^[2] (see Sagittarius A*), are believed to contain supermassive black holes at their centers.^[3][4]

Supermassive black holes have properties which distinguish them from lower-mass classifications. First, the average density of a supermassive black hole (defined as the mass of the black hole divided by the volume within its Schwarzschild radius) can be equal to, for stellar-mass black holes, or less than the density of water in the case of some supermassive black holes.^[5] This is because the Schwarzschild radius is directly proportional to mass, while density is inversely proportional to the volume. Since the volume of a spherical object (such as the event horizon of a non-rotating black hole) is directly proportional to the cube of the radius, the density of a black hole is inversely proportional to the square of the mass, and thus higher mass black holes have lower average density. Also, the tidal forces in the vicinity of the event horizon are significantly weaker. Since the central singularity is so far away from the horizon, a hypothetical astronaut traveling towards the black hole center would not experience significant tidal force until very deep into the black hole. 

 http://en.wikipedia.org/wiki/Supermassive_black_hole

عشق

 

Love is Wide Ocean that joins two shores

عشق اقیانوس وسیعی است که دو ساحل رابه یکدیگر پیوند می دهد 

 -----------

Life without love is none sense and goodness without

Love is impossible

زندگی بدون عشق بی معنی است و خوبی بدون عشق غیر ممکن 

 -------- 

Love is something silent, but it can be louder than anything

When it talks

عشق ساکت است اما اگر حرف بزند از هر صدایی بلند تر خواهد بود 

 http://entime.blogfa.com/