logo

English
                 

Science Why space is so dark?

2019.03.20 12:08

이한중*65 Views:57

Why Space Is So Dark?

by Robert Mathews

 

This is one of those ‘silly’ questions, which has an answer that’s anything but. It’s perplexed many astronomers since the time of Sir Edmond Halley, of comet fame, in the 17th century. That’s because although starlight gets fainter with distance, a simple calculation shows the fading is cancelled out by the ever-increasing numbers of stars with distance, and should therefore leave space ablaze with light.

Clearly, there’s something wrong with the simple calculation, and a big clue about what it is came in the 1920s when astronomers discovered that the Universe is expanding after exploding from a Big Bang billions of years ago. As such, stars haven’t existed long enough to fill the Universe with their light, which is also stretched and weakened by the cosmic expansion. The result is a Universe as black as pitch.

No. Subject Date Author Last Update Views
Notice How to write your comments onto a webpage [2] 2016.07.06 운영자 2016.11.20 17771
Notice How to Upload Pictures in webpages 2016.07.06 운영자 2018.10.19 31855
Notice How to use Rich Text Editor [3] 2016.06.28 운영자 2018.10.19 5498
Notice How to Write a Webpage 2016.06.28 운영자 2020.12.23 43428
83 허준이 수학 필즈상 수상 [1] 2022.07.05 온기철*71 2022.07.08 79
82 Joe Biden이 한국을 처음으로 방문, 삼성전자를 찾은 이유? [2] 2022.05.31 운영자 2022.06.01 61
81 Trump's Evil Power is waning in Georgia !! [1] 2022.05.25 운영자 2022.05.27 84
80 Will H replace C? [2] 2022.04.22 온기철*71 2022.04.23 90
79 Can white paint save the earth from global warming? [1] 2021.10.18 온기철*71 2021.10.31 167
78 Lecture on COVID-19 Vaccine Making & Current Issues, etc. by CY Kang [8] 2021.06.23 이한중*65 2021.06.28 1229
77 코로나 실험실에서 만들어 졌다. [7] 2021.05.30 온기철*71 2021.06.01 107
76 Neutrophils may lead to cell aging [3] 2021.04.11 이한중*65 2021.04.11 197
75 mRNA, Next Frontier of Medicine [2] 2021.02.11 이한중*65 2021.02.12 111
74 한국의 근현대 천문학자 [2] file 2021.01.16 최광택*70 2021.01.20 136
73 엔셀라두스 와 유로파 (바다가 있다) [1] 2020.12.26 최광택*70 2020.12.27 82
72 목성과 토성 [5] file 2020.12.23 최광택*70 2020.12.27 284
71 Einstein’s Quantum Riddle 2020.12.20 온기철*71 2020.12.20 79
70 For the first time Nutrinos detected 2020.11.25 이한중*65 2020.11.25 98
69 What Did Newton Actuality Discover in Quarantine? [2] 2020.10.18 이한중*65 2020.10.19 3737
68 The Nobel Prize in Physics 2020 [3] 2020.10.06 이한중*65 2020.10.06 57
67 Dark Matter Questions [5] 2020.06.23 이한중*65 2020.06.25 367
66 What is the Big Bang? [1] 2020.06.12 이한중*65 2020.06.13 151
65 핵폭탄, 핵잠수함 - 놀랍게 가까운 한국의 기술-능력 [4] 2020.05.25 운영자 2020.05.26 614
64 Square Kilometre Array [3] 2020.05.20 이한중*65 2020.05.21 108