The known universe is made up of 50,000,000,000 galaxies. There are between 100,000,000,000 and 1,000,000,000,000 stars in a normal galaxy. ...Read More
The known universe is made up of 50,000,000,000 galaxies.
Reviewed by Osuofia ifeanyi
on
April 08, 2017
Rating: 5
It can take a photon 40,000 years to travel from the core of the sun to its surface, but only 8 minutes to travel the rest of the way to Ear...Read More
It can take a photon 40,000 years to travel from the core of the sun to its surface, but only 8 minutes to travel the rest of the way to Earth
Reviewed by Osuofia ifeanyi
on
April 08, 2017
Rating: 5