Sevilay: The light from the red star-Betelgeuse- has taken 643 years to travel to your eye. And the light from the blue star- Rigel- Has taken even longe: 773 years. Light travels at about 300.000 kilometres evry second, which is 9,460,730 million kilometres a year (we call that distance a light year). So that blue star, Rigel, is 7,313,144 billion kilometres away. But you can still see it- with your own eyes, without a telescope. That is amazing. Of course, you cannot see what Rigel looks like today- nobody can. You can only see qhat the star looked like 773 years ago. So when you look at a star like Rigel or Betelgeuse you are not just looking at something an enormous distance away; you are also looking back in time.

The light from the red star-Betelgeuse- has taken 643 years to travel to your eye. And the light from the blue star- Rigel- Has taken even longe: 773 years. Light travels at about 300.000 kilometres evry second, which is 9,460,730 million kilometres a year (we call that distance a light year). So that blue star, Rigel, is 7,313,144 billion kilometres away. But you can still see it- with your own eyes, without a telescope. That is amazing. Of course, you cannot see what Rigel looks like today- nobody can. You can only see qhat the star looked like 773 years ago. So when you look at a star like Rigel or Betelgeuse you are not just looking at something an enormous distance away; you are also looking back in time.

Sayfa 4 - oxford

Space Tim Vicary

19 views

Yorum yapabilmeniz için giriş yapmanız gerekmektedir.

Gönderi

Sevilay