Astophysics , Black Hole I

- Black holes are celestial bodies formed by further distinguished from a dead star, (→ star collapse supernovae). When an object enters the black hole then the object will be trapped, and wont be out in its original shape (the light was experiencing the same thing)

- The Radius of Swartzchild → distance from the central black hole to the event horizon, with the formula:

r = 2GM/c2

- → point singularity at the center of black holes interesting objects in the vicinity.

- Horizons Genesis → spherical boundary of a black hole viewed from the inside (none objects will be come out)

- The earth will shrink to 18mm before becoming a black hole, without losing its mass (assuming)

- Examples of celestial bodies which is suspected as a black hole

1. Cygnus X1

2. M87
(Quote from Einstein little biography with several changes)

Global Warming Issue

 In the 21st century now, modern human beings who have technology-based civilization, but human to human activity especially 21st century makes the stability of our earth is disturbed by the phenomenon of global warming. Global warming is an event which in earth temperature increases resulting from CO2 and CFCs (Chloro Floro Carbon) that are trapped in Earth's atmosphere and can not be described so that the heat from sunlight is not fully reflected by the earth.

The impact than the temperature of the earth is getting warmer, also can cause chunks of ice at the two poles of the earth slowly melt, causing sea level rise (epirogenetic), also resulted in holes in the ozone and which in fact is the earth's magnetic shield protects the earth from the sun superabundant, and from the billion of protons due to solar sunspot activity.


(Quote from my indonesian task)

4 Dimension

Universe consists of 4 dimensions, 3 dimensional space consisting of the length, width and height. 4 is a time dimension to the visible linear and bound with other dimensions.