Space

Space debris

Space debris 17 Look up at the slay. What do you see? Apart from the many cosmic bodies that we can see through our naked eyes such as the moon, stars and the planets, it also encompasses galaxies, nebulae, black holes and so on. Now add to that the many spacecraft and satellites we put in Earth's orbit. Any man-made, artificial materials that are orbiting the Earth which is no longer operational are referred to as space debris or space junk. They just float in space. In terms of their size, they can be as big as an inactive satellite or as minuscule as the paint flecks that come off a rocket. Most of the debris can be found in the Low Earth Orbit (LEO), which is less than 1000 km from the Earth's surface. At times they are also found in the geostationary orbit. The time taken by the debris to re-enter Earth's atmosphere depends upon its altitude. The "pollution" of space due to human activities has been a concern that space faring nations must address at the earliest. Space debris

Space Tourism

Ever wanted to travel to outer space and watch our blue planet from the perspective of an outsider? Well, space tourism is all about experiencing outer space and the universe in all its ethereal magnificence. It is recreational space travel. It can become a reality through 18 Space tourism government owned vehicles or through private companies. The world's first space tourist was American businessman Dennis Tito back in 2001 when he toured outer space. There is a backstory behind it. To generate income for the maintenance of the aging space station Mir MirCorp, a private venture in charge of the space station decided to sell the trip to Tito. But even as he paid for the same, a decision was made to deorbit Mir. That's how the destination changed to ISS. Following this, many joined the handwagon and flew as a spaceflight participant to the ISS for recreation. These were orbital space tourism. Presently, the focus is largely on suborbital space tourism. In sub-orbital rocket powered.

Dark Energy

All these year scientists have been trying to unravel the mysteries of the universe. But in vain. The universe and its stress cannot be comprehended by the human eye nor in the human mind. What ebe is possible what else is out there? We look up for answers, into the vast cosmic ocean. Dial you know that what we comprehent is just four percent of what is there in the universe? All of that you ous see, touch and experience just contriinute to less than 5 percent of the whole universe What's the rest? The rest is just dark. Dark matter makes up for 27 percent of the universe and s8 percent is dark energy Dark energy is still an enigma as is the universe. It is something that scientists have not been able to find an answer to. Albert Einstein was the first to postulate that the empty space is not nothing. He added the cosmological constant and said the universe is static (neither eqsanding nor contracting). He later agreed that the universe is expanding. We now know that its only accelerating and not slowing down due to gravity. one explanation is that it is the dark energy that drives this accelerated expansion. There is a dark force that is pulling galaxies apart and results in faster expansion rate. It is a kind of cosmic repulsive force that make up the dominant component of the universe which is called the dark energy.