Posts

Showing posts from June, 2020

The SUN

Image
WHAT IS THE SUN? The Sun is what is known as a main sequence star; that is, a sphere composed primarily of the two gases hydrogen and helium such that certain conditions are met. The first condition is that it must have a mass falling within a certain range. Though debated, this range is generally accepted to be between approximately 1.4 x 10 29  kg and 3.0 x 10 32  kg. (This range is often describe as at least 75 times the mass of  Jupiter  and no more than 150 times the mass of the Sun itself.) The second and most important condition is that nuclear fusion must be present. Nuclear fusion is the process whereby two lighter atomic nuclei join or “fuse” together to produce a heavier atomic nucleus. In the context of stars, hydrogen is the lighter and helium the heavier. SIZE OF THE SUN The size of the Sun compared to the largest known stars ( red giants ) is not very big. However, if compared to the most common type of star in the universe, the red dwarf, the Sun is q...

The Moon

Image
  THE  MOON The Moon (or Luna) is the  Earth’s  only natural satellite and was formed 4.6 billion years ago around some 30–50 million years after the formation of the  solar system . The Moon is in synchronous rotation with Earth meaning the same side is always facing the Earth. The first uncrewed mission to the Moon was in 1959 by the Soviet Lunar Program with the first crewed landing being Apollo 11 in 1969. Moon Profile Diameter: 3,475 km Mass: 7.35 × 10^22 kg (0.01 Earths) Orbits: The Earth Orbit Distance: 384,400 km Orbit Period: 27.3 days Surface Temperature: -233 to 123 °C Size of the Moon Compared to the Earth Moon  size compared to the  Earth Facts about the Moon The dark side of the moon is a myth. In reality both sides of the Moon see the same amount of sunlight however only one face of the Moon is ever seen from Earth. This is because the Moon rotates around on its own axis in exactly the same time it takes to orbit the Earth, meaning the s...

Cakes history

Image
The First Instance of Cutting Cakes But having you ever wondered why we cut a cake? Why not cut anything else? Is there any ancient historical significance behind the cake? Or is just a fun thing? The ritual of cake cutting finds its prevalence in ancient Greece, where the Greek celebrated their fifthieth birthday by cutting cakes. There were honey cakes made in a circular shape to honour the moon These cakes were first taken to the temple of Artemis, the Moon Goddess Germans and the Cake The Medieval age also bears testimony to the culture of cutting cakes. Cakes were cut to commemorate the birth of Jesus in the middle ages in Germany. These cakes were shaped like baby Jesus and were made out of sweetended dough. As time progressed, people started celebrating the birth of their children which was called Kinderfest. As time progressed, the sweetened dough was replaced by a much sweetened version of the cake, called Geburtstagstorten.  By the advent of 17th century, the cakes got a ...

The stars

Image
                        THE STARS There are 9,096 stars visible to the naked eye in the entire sky. To see more, you have to use a telescope to reveal stars fainter than your eyes can see. You can only see about 2,000 stars on a very dark night with the naked eye from  any given place on Earth. To do this, you need to observe on a moonless night and be far away from sources of light pollution. Astronomers estimate there are a trillion stars in the Milky Way Galaxy. Stars are born in batches in their stellar nurseries. Over time, they travel through the Milky Way, far from their crèches. Most stars travel the galaxy with companions or in clusters. But not all stars do that; our Sun, for example, moves through the galaxy without a stellar companion. Regards Vivek Tomar

Earth fact

Image
Since 1970, Earth Day has been here to showcase the beautiful planet third from the sun that we call home. More specifically, Earth Day has been used to highlight the various environmental problems (such as climate change) that our planet has faced due to industrial and technological advances. In celebration of Earth Day's 50th anniversary, here are 20 amazing reasons we love this rock called Earth. Regards vivek tomar