Tag Archives: planet earth

What If There Were Only 1,000 People Left on Earth?

What If There Were Only 1,000 People Left on Earth?

With so many amazing things happening in the world today, what could possibly go wrong? Well…A giant asteroid is barrelling on a collision course with Earth, and life as we know it is on the brink. After the smoke clears…
How do we start over? Where would we live? What might we do differently?

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What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.

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Discovered Two Super Earth Exoplanets Orbiting A Star! (Gliese 887b And Gliese 887c)

Discovered Two Super Earth Exoplanets Orbiting A Star! (Gliese 887b And Gliese 887c)

From what this new exoplanet is, to what it could mean for our understanding of the universe as a whole, and more! Join us as we reveal to you the discovered two super-Earth exoplanets orbiting a star! (Gliese 887b And Gliese 887c)
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Humanity has a goal to explore the stars, a goal that may find itself getting a boost in feasibility by the end of the decade. But we also know that to look outside our solar system is important because we can learn even more from the planets and stars that range across the solar system and see how it reflects what is near us. To that end, one of our greatest goals is to find and research as many exoplanets (a planet which orbits a star outside the solar system) as we can and see what they are like and what we can learn from them. Which is good, because we just found a major discovery which might just change things forever.
Because looking at the brightest red dwarf star in the sky may have presented the best chance astronomers have yet to analyze the atmospheres of alien worlds — and perhaps detect whether those worlds have life. This is according to a new study that was recently released.
Scientists focused on the red dwarf star GJ 887, also known as Gliese 887. (Red dwarfs are the most common kind of star in the galaxy, and weigh between 7.5% and 50% the mass of the sun.) At a distance of about 10.7 light-years from Earth, Gliese 887 is the twelfth-closest star. Furthermore, at visible wavelengths, Gliese 887 is the brightest red dwarf in the sky, and with nearly half the sun’s mass, Gliese 887 is the heaviest red dwarf star within about 20 light-years of Earth. That may sound like a lot of needless stats but when it comes to stars you need to know as much about them to fully understand their power, potential, and lifespan.
Previous work found that many red dwarfs host planetary systems, ones usually made up of multiple small worlds. Still, “we’ve been looking for exoplanets orbiting Gliese 887 for nearly 20 years, and while we saw hints of a planetary signal, it wasn’t strong enough to convince ourselves that it was a planet,” study lead author Sandra Jeffers, an astrophysicist at the University of Göttingen in Germany, told Space.com.
But that has now changed in a major way.
Pressing forward, the researchers examined Gliese 887 for 80 nights in 2018. They relied on the High Accuracy Radial Velocity Planet Searcher (HARPS) instrument at La Silla Observatory in Chile, combining this data with archival measurements of the star spanning nearly two decades.
Astronomers use two strategies to discover most exoplanets, or worlds beyond our solar system. One method relies on how distant worlds regularly block out a fraction of light from their stars as they pass in front of their stars from the observer’s perspective. However, this method will only spot planets that pass through the line of sight between Earth and their stars, meaning it will only detect a small fraction of exoplanets.
Instead, the scientists in this latest work looked for any wobbles from Gliese 887 due to gravitational tugs from orbiting planets. This was where their breakthrough came from. They found the red dwarf has at least two “super-Earth” exoplanets, dubbed Gliese 887 b and Gliese 887 c. The former is about 4.2 times Earth’s mass and orbits just 6.8% of an astronomical unit (AU) from its star (one astronomical unit is the average distance between Earth and the sun), whereas the latter is about 7.6 times Earth’s mass and orbits 12% of an AU from the red dwarf.
To be honest, finding even one exoplanet there after two decades of finding nothing would’ve been momentous in its own right, but finding two? That is something truly special. And yet, that wasn’t all.
The researchers also found evidence for a possible third planet farther out from Gliese 887. Although the red dwarf’s two confirmed planets are likely too hot for life as we know it on Earth, this potential third planet might lie within the star’s habitable zone, where surface temperatures are suitable to host liquid water. Which by our definitions is important to have life, which is one of the many reasons we search for exoplanets so we can see if there’s another planet of life out there.

#InsaneCuriosity #Exoplanets #Gliese887

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What Would Happen If The Moon Disappeared?

What Would Happen If The Moon Disappeared?

What would happen if the moon disappeared?
Our moon had a great status from the beginning of human civilization, it was immortalized by
various religions all around the world. In greek mythology there was a moon goddess named
Selene the daughter of the Titans Hyperion and Theia, it was worshiped and respected the
same way as the sun god Helios which indicates that our ancestors placed the moon and the
sun on equal footing. Moon is also worshiped in Hindu mythology by those who have
fluctuations in their life, ups and downs and by those who wish to have sons.
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The moon is featured in Van Gogh’s masterpiece “The starry night” , Frank Sinatra’s delightful song “Fly me
to the moon” and many other captivating art works. Art and history have always been enchanted
by the moon but today we intend to highlight the important role of the moon in elevating our
civilization from a scientific perspective. Our aim is to answer the question “ what would happen
if the moon disappeared? “

Before answering that question here are some facts about the moon:
1- The moon is the nearest and brightest celestial object orbiting the Earth in an elliptical path. It
may not follow the same path every cycle due to the fact that its orbit orientation is not entirely
fixed in space but rotates over time resulting in precession and inclination. Its apparent size
differs from the actual size due to the relative motion to an observer on the earth, you can
understand this as follows, the nearer an object to you the bigger you will see it.
2- The moon was formed 4.51 billion years ago approximately after 60 million years of the entire
formation of the solar system. There are several models regarding the moon formation but the
prevailing model is that the Earth-Moon system was formed due to an extremely huge impact
between a Mars sized celestial body called Theia and the proto-Earth, which is the earth at its
very early stages. The impact resulted in the Earth with its shape today and some other material
in its orbit which accreted and formed the moon.
3- Like the earth, the moon is a differentiated celestial body that can be divided into crust,
mantle and core. The Core is solid with a molten iron boundary around it, the mantle is the
largest layer formed by a complex yet extremely important process called the magma fractional
crystallization. The geo-chemical mapping of the moon rocks collected by the Apollo mission
suggests that the crust is mainly composed of mafic minerals which are rich in magnesium and
iron.
4- The photodecomposition process prevents the formation of water on the lunar surface. In
other words, the photons radiated by the sun decompose the water molecules formed on the
lunar surface.

After knowing some interesting facts about the moon and how it was formed, It’s time to
consider the main question of today’s episode.
1- You may wonder what is exactly the relation between the moonlight absence and the
disturbance of the ecosystem because at the first glance they may seem completely unrelated,
however they are strongly connected. The ecosystem is by definition a biological community of
interacting organisms and their physical environment, it contains biotic and abiotic parts; the
biotic parts include all the living organisms whereas the abiotic components include the
environmental factors such as rocks, temperature and humidity. According to the encyclopedia
of national geographic, every factor in the ecosystem depends on every other factor either
directly or indirectly and the slight disturbance in one factor will end up affecting the whole
ecosystem; for example the change in temperature of an ecosystem will limit the type of plants
that grow in there and hence will affect the animals that depend on these plants as a primary
source of food and shelter leading them to adapt to that change or move to another ecosystem
or perish. Another important and related concept to highlight is the food chain; which describes
how energy and nutrients move through an ecosystem. In the food chain, energy is transferred
from one living organism through another in the form of food. There are primary producers such
as plants, primary consumers such as animals that depend on plants as their food source and
secondary consumers such as predators and decomposing organisms.

#InsaneCuriosity #ToTheMoon #MoonFactsAndHistory

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What If Every Satellite Fell to Earth?

What If Every Satellite Fell to Earth?

Thousands of satellites and pieces of debris currently orbit our Earth. They provide us with television, internet, and communications. But what if all these satellites suddenly went offline? And then came crashing down to Earth? What would a crashing satellite do to the Earth? How many satellites would come falling down?

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Watch more what-if scenarios:
Planet Earth:
The Cosmos:
Technology:
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What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.

Produced with love by Underknown in Toronto:

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