CURRENT AFFAIRS

Detailed explanation-1: -NASA’s Swift satellite recently detected a rising tide of high-energy X-rays from a source toward the center of our Milky Way galaxy. The outburst, produced by a rare X-ray nova, announced the presence of a previously unknown stellar-mass black hole.

Detailed explanation-2: -Scientists have discovered a “strange and persistent” radio signal from a far-off galaxy that sounded like a heartbeat. Astronomers at the Massachusetts Institute of Technology and elsewhere detected the signal, which is classified as a fast radio burst, or FRB-but lasted much longer.

Detailed explanation-3: -Scientists have identified the source of mysterious flashes of cosmic radio waves known as fast radio bursts (FRBs): a surprisingly small galaxy more than 3 billion light-years away. The discovery may help researchers understand one of the biggest mysteries in astronomy.

Detailed explanation-4: -Astronomers have detected a radio signal from the most distant galaxy yet. The signal was detected at a special and significant wavelength known as the “21-centimeter line” or the “hydrogen line, ” which is emitted by neutral hydrogen atoms.

Detailed explanation-5: -There are around fifty galaxies in the Milky Way, the largest of which is the Large Magellanic Cloud. This satellite galaxy has a diameter of only 14, 000 light-years. The Large Magellanic Cloud may have as many as 10 billion stars within it. This small galaxy will collide with our Milky Way in around 2.4 billion years.