A team of astronomers using the Hubble Space Telescope found an unambiguous link between the presence of supermassive black holes that power high-speed, radio-signal-emitting jets and the merger history of their host galaxies. Almost all galaxies with the jets were found to be merging with another galaxy, or to have done so recently.
ISS is the third brightest object in the night sky!
It often comes as a surprise to people when i tell them that the space station can be seen with the naked eye! Flying at 400 km above your head, the ISS looks like a really fast moving airplane in the sky.
The ISS isn’t brighter than the day sky and hence cannot be seen during the day. But in the night, it’s the third brightest object in the sky! It reflects the sunlight off the solar panels on its surface.
Spot the station!
If you would like to see the ISS for yourself, NASA ‘s Spot the station! is at your disposal. Register with your email address/mobile number and every time the ISS passes by your town/city, you will get a notification with the time, duration and inclination.
(Extras: There are mobile phone apps which you could use too, like the ISS detector satellite detector for android. At the end of the day all that matters is what is convenient to you.
In Laser Thruster Advance, Light Alone Pushes a Sled Down a Track
Here is the latest demonstration of a propulsion technology called a photonic laser thruster. In it, NASA Innovative Advanced Concepts Fellow Young Bae moved a one-pound object on a track using light alone for the first time.
The hope is that a laser fired from one spacecraft to another will provide enough push to make this form of propulsion viable for interplanetary travel. Back in 2013, the agency expanded research on the concept of photonic laser thrusters after discovering it could have “a much larger potential in NASA mission applications.”