The human body, which has evolved under the condition of gravity, cannot endure prolonged weightlessness without adverse effects, the most serious one of which is depletion of calcium from the bones. For example, all the astronauts of one of the missions of NASA’s space laboratory named Skylab had lost 7% calcium through … Read more
Researchers say that the Sun emits more energy in one second than any person who has emitted it in his or her whole life! The inherent source of solar output is a complicated process called fusion. In the core of the Sun, millions of nuclear reactions take place, and those reactions then … Read more
It has been over 50 years since humans first visited the Moon on July 20, 1969, and provided us with valuable information about the Earth’s natural satellite. Around 600 million people watched this fantastic feat live on television. On the American astronauts’ return, people were exhilarated to see what they brought back … Read more
In simple words, an atmosphere for a planet or star is the layer of gases that surround it. These gases stay in place due to the gravitational force of the planet/star. For our Earth, the atmosphere is what makes the planet suitable for life to flourish. If we didn’t have just the … Read more
Stars are magnificent, wondrous bodies. When you look up in the sky, you will see them twinkling in various colors. Some tend to be pale and reddish. Others seem to have a bright whitish or bluish color. But, have you wondered why they come in different colors? Well, think about a campfire. … Read more
Our Universe is expanding and has been increasing in size ever since its birth from the Big Bang. With the way it’s currently growing, we’re safe for now, given that it won’t be tearing itself in its demise for at least 2.8 billion years. But how will it happen? Galaxies beyond our … Read more
We imagine that there is an empty, dark, soundless, space, or hole when we hear about black holes, but let not its name fool you. The black hole is a tremendous amount of matter packed into a tiny area. Its size is likened to a star ten times more massive than the … Read more
For every particle, there can be an antiparticle. Antimatter consists of such antiparticles – that is, subatomic particles that have the same mass as the particles that exist in the ordinary matter, but have equal and opposite electric charge. In simple terms, antimatter is something like a mirror image of the matter. … Read more