1. Brown Dwarfs Brown dwarfs are sometimes referred to as “failed” stars. They are too low in mass to fuse atoms at their cores, and thus don’t burn with the fires, that keep stars like our sun shining steadily for billions of years. Instead, these objects cool and fade with time, until what little light they do emit is at infrared wavelengths. The Y’s are the coldest members of the brown dwarf family. One of …
Did you know that April 25 of each year is the World Penguin Day? To celebrate this day, Toplst decided to present you a list with some interesting facts about these charismatic seabirds. Penguins seem a bit out of place on land, with their “fashion tuxedos” and clumsy waddling. And then they enter into the water and you see their grace and think for yourself “that’s where they’re meant to be!”. 1. Depending on which …
Dolphins are extraordinarily intelligent animals, one of the most interesting forms of aquatic life out there. And one of my favorite animals! They are easy to recognize and you likely already know they are very smart. Yet there are plenty of great facts about them that you may not know. Let’s change that and explore 27 characteristics of dolphins and learn more about them! 1. Dolphins are not fish! They belong to a group of …
1. Speed The speed of light in vacuum is around 300,000 kilometres per second (186,000 miles per second). 2. Variable Speed The speed of light is less than in vacuum when traveling through different transparent substances containing ordinary matter. For example the speed of light in water is about 3/4 of that in vacuum. 3. Sunlight Sunlight takes about 8 minutes and 17 seconds to travel the average distance from the surface of the Sun …
1. Satellite The Moon is not a planet, it is the natural satellite of the Earth. 2. Surface The surface area of the Moon is 37,932,000 square km (14,658,000 square miles) or 9.4 billion acres. 3. Radius The radius of the Moon is 1,738 kilometers (1,080 miles). 4. Diameter The diameter of the Moon is 3,476 kilometers (2,160 miles). 5. Weight The total weight of the Moon is 74 sextillion kilograms (81 Quintillion Tons). 6. …
1. Naming Earth is the only planet in the solar system whose name does not derive from gods or goddesses names. 2. Centre of the Universe Due to the apparent movements of the Sun and the planets in relation to our viewpoint, ancient civilizations believed in the Ptolemaic system, a description of the cosmos where Earth is at the orbital center of all celestial bodies. It was not until the time of Copernicus (sixteenth century) …