1st about Universe & Space
- There are more stars than all of the grains of sand on Earth.
- In space, astronauts cannot cry, because there is no gravity, so the tears can’t flow.
- A person of 60 kgs weight barely will weigh 10 kg on Moon, but 1,680 kg on the Sun.That means ,you would weigh 1/6th of your weight on Moon & 24 times more on Sun.This happens due to gravitational pull at different places.
- Sirius (Dog star )is much brighter than the sun. In fact, no star is as bright as Sirius.
- If you shouted in space even if someone was right next to you they wouldn’t be able to hear you as there is no air to carry your message .
- It is impossible to snore while sleeping in the weightlessness of space .
- A light year is the distance light travels in a year .
- Galileo was the first scientist to look ar night sky through a telescope.