Why is the Sunset Red?

Why the sky is red at sunset?

Sunsets often produce beautiful images. The sky and clouds are painted in different colors – red, pink, yellow, pale blue and even violet. Obviously, all this beauty is possible due to the fact that the setting sun changes its color from bright yellow to orange and even red. But why is this happening? In fact,… Continue reading Why is the Sunset Red?

What is Darwin’s Theory of Evolution?

Darwin's great idea: Evolution by natural selection

“It is like confessing a murder” begins Charles Darwin, probably his most famous work. In fact, his theory of evolution revolutionized natural sciences. It also shook the prevailing worldview. In the mid-19th century, most people believed that God created the earth in 4004 BC. No species has evolved or been extinct since the birth of… Continue reading What is Darwin’s Theory of Evolution?

Let’s say I don’t believe the world is round. How can anyone prove to me that the world is round?

The Earth is not flat.

How can anyone prove to me that the world is round? I will skip the obvious answer “there are photos from space”, and move on to the interesting part – how can I, by any means, prove that the earth is spherical and not disk? Here I would like to point out – the Greeks… Continue reading Let’s say I don’t believe the world is round. How can anyone prove to me that the world is round?

Does the moon look the same everywhere?

Since the earth is around 30 times further away from the moon than its diameter, you can have a different angle of view of the moon up to 1.2 degrees.

The answer is a classic yes and no. In general, the moon has an earth-bound orbit, which means we always see the same side. Always and everywhere. While the earth rotates once in 24 hours, the moon moves about 1/30 on its axis. This hardly changes the angle between the sun, moon and earth. So the phases of the moon… Continue reading Does the moon look the same everywhere?

What are Stars? A Short Introduction.

The brightest star in the sky is Sirius, also known as the “Dog Star” or Alpha Canis Majoris

Stars are huge balls of gas that are held together by gravity. The most common elements in stars are hydrogen and helium, which make up about 98% of their mass. Stars shine because of nuclear fusion, which is the process of combining two or more atomic nuclei to form a heavier nucleus. This process releases… Continue reading What are Stars? A Short Introduction.

SN2016aps: The Brightest and Most Massive Supernova ever Detected

Supernova exploding.

When astronomers discovered the SN2016aps supernova in 2016, they knew they were dealing with something colossal, though not exactly what its magnitude was. SN2016aps is the brightest and most massive supernova It was discovered in 2016 by the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) observatory in Hawaii. The supernova is located in a… Continue reading SN2016aps: The Brightest and Most Massive Supernova ever Detected