Why is space so dark even though the universe is filled with stars?

"You might guess it’s because a lot of the stars in the universe are very far away from Earth. Of course, it is true that the farther away a star is, the less bright it looks – a star 10 times farther away looks 100 times dimmer. But it turns out this isn’t the whole answer."

https://theconversation.com/why-is-space-so-dark-even-though-the-universe-is-filled-with-stars-205810



Comments

Post a Comment

Popular posts from this blog

Did dust from the Chicxulub asteroid impact kill the dinosaurs?

Image
"Dust might have been responsible for the deadly dinosaur-killing global winter that came after an asteroid slammed into Earth 66 million years ago, finds a study published on 30 October in  Nature Geoscience 1 . A team of geoscientists led by Cem Berk Senel at the Royal Observatory of Belgium in Brussels reinvestigated the aftermath of the impact that formed Mexico’s Chicxulub crater — a collision that wiped out the non-avian dinosaurs and much of life on Earth." For more details: https://www.nature.com/articles/d41586-023-03406-7
Read more

Sexing the Canvas: Art and Gender MOOC

Image
  What do paintings tell us about sex? How is art gendered? In this course we will study some of the world’s most beloved pictures guided by expert curators and art historians who step outside of the square, bringing a gendered reading to the masterpieces contained in the magnificent collections that we have been lucky enough to bring to the Coursera platform. In this course you will learn how: * Gender and sexuality is an integral part of the production and reception of works of art * To increase your understanding of paintings through theories of gender and sexuality * To understand key terms from gender-related theories of art history and museology * To recognise the operation of what is termed ‘the gaze’ and how it works in relation to paintings * Ideas about gender and sexuality can productively be employed in theorising art curatorial practices * To take the initiative in relating theoretical ideas about gender and sexuality to the reading and display of art and visual cultu...
Read more

Advice for Time Traveling to Medieval Europe: How to Staying Healthy & Safe, and Avoiding Charges of Witchcraft

Image
"  Generations of foreign tourists in Europe have heard advice about traveling in groups, haggling prices, avoiding pickpockets, and being able to communicate in, if not the local language, then at least the lingua franca. It turns out that very similar guidance applies to time travel in Europe, or at least specifically to the region of England, France, Germany, and northern Italy in the central Middle Ages, roughly between the years 1000 and 1400." For more details: https://www.openculture.com/2023/11/advice-for-time-traveling-to-medieval-europe-how-to-staying-healthy-safe-and-avoiding-charges-of-witchcraft.html#google_vignette And a book about the Medieval Europe: https://amzn.to/49ytT2p
Read more