Astrology : The Study Of Life On Exo Earth

Then red dwarf star that was discovered by Michal Gillion and his team with the spencer telescope. Once they discovered this star that is a lot small and colder than our sun, it allowed them to get a vision of the seven planets. The star is about 40 light years away. There are not 3 or four planets but there are 7 earth like planets.

A protostar is a contracting cloud of gas and dust that contains enough mass to form a sun. Together, growing pressure and mass form both the protostar and the remaining star phases that will follow afterward. During the protostar phase, nuclear fusion begins. Nuclear fusion is the process in which atoms combine to create larger atoms. In a star, the nuclear fusion converts hydrogen into helium. This nuclear fusion in the protostar produced an outward force along with gravity. After this phase, the protostar becomes a main sequence

The topic of finding life on another planet, or seeing if we are the only ones in our Universe has been a mystery to us since the beginning of time. One of the closest findings NASA has found to this topic was exoplanets. Exoplanet is defined as a planet that orbits a star outside the solar system. NASA’s Kepler Space Telescope is the main telescope used to search for exoplanets that have similar features to Earth, and habitability on these exoplanets. NASA has found over 2,000 exoplanets so far, and out of those, there are only about eight exoplanets that seem to have a possibility on being a habitable exoplanets. Among these eight, Kepler 62f seems to be the most plausible.

Currently, there is only one planet we know of to host life, and that is our home planet Earth. The question remains as to what is exactly needed for a planet to be considered habitable, but scientists have developed a handful of criteria to help distinguish what planets could be “just right” for life. The ongoing search for possible habitable planets has produced many remarkable findings but nothing quite as extraordinary as the discovery of the system Trappist-1. According to nasa.gov, it is the first known system of seven Earth-size planets around a single star, and it meets the criteria to possibly sustain life (“NASA Telescope Reveals” p.1). This discovery poses a likely answer to the question “are we alone” and drives our search for finding out more about what is out there.

At some point in the future when the hydrogen runs out, at that point the star will start to collapse itself under its own weight. It get denser, hotter until the point where it starts to use the helium atoms themselves as the fuel for the fusion. As the star begins to fuse helium, it creates more energy and that causes the outer layers of the star to start to expand. One day our sun will grow so large that it will swallow up the inner planets of our solar system. It will become a red giant, for the sun this will be the beginning of the end. Then they explode and become a supernova or for some biggggggggggeeeeerrr stars it would be a hypernova, which is waaaayyy stronger than a supernova; supernovas are some of the most beautiful sights in the universe. Lucky for us, our sun is too small to even explode and become a supernova. These explosion of stars are so powerful that it can outshine the whole galaxy during its explosion. For the

Orion has two of the brightest stars, be Betelgeuse and Rigel. Betelgeuse is a red supergiant. The gravity of the star squeezes its core tightly, heating it to billions of degrees. It then fuses the helium to make heavier elements. When that happens, the star no longer produces energy in the core. Without the reactions in its core to push outward, gravity quickly causes the core to collapse, forming a neutron star.

However it is easy to calculate the properties of these planets from the transit. The length of time between transits determines how far the planet is orbiting from its host star and the amount of luminosity drop indicates the planet's size. The transit method is also able to calculate the presence of very small planets with advanced telescopes like Kepler. The size of the star is already known, so in proportion to the stars size the planets transit interval can be used to calculate its position in the solar system. If the star is large and transits are relatively close intervals we know the star is close to its host star, meaning that the planet is too hot to be able to host liquid water. If the planet is located in a rough zone between the ‘too hot’ and the ‘too cold’ to host liquid water. This is called the habitable zone3. The significance of this is that if there is liquid water present on a planet, it has the possibility for life to exist there. However , as scientists discover more and more extremophiles (life forms living in extreme environments) what constitutes as ‘habitable’ is changing 4. Midocean Ridge life forms, life without any form of sunlight, use geothermal vent emissions to create food for themselves in a process called ‘chemosynthesis’. Before the discovery of this was thought impossible for life to exist in such harsh conditions. Planets may not have to be as ‘Earthlike’ as

If the fusion of hydrogen into helium of red dwarfs’ was any less they would not be classified as a red dwarf at all. Instead, they would be brown dwarfs which are not stars since they cannot sustain hydrogen fusion. More massive stars accumulate hydrogen and helium in their cores while red dwarfs are convective. This means the helium and hydrogen are constantly mixing throughout the entire mass of the of a red dwarf

The Kepler mission is searching for planets that are enough like Earth to be considered habitable. Discovered in January 2015, Kepler-438b looked like an excellent candidate. The planet fit the two key characteristics for a Kepler candidate to a T. The first of these is that the planet has to be rocky, like Earth or Mars, rather than gaseous, like Jupiter or Saturn. The second is that it has to orbit its star in the habitable zone, where temperatures are neither too hot nor too cold to support life.

Let’s take a look at one of the first successful ways to find exoplanets, radial velocity, or watching for wobble, which is the gravitational interaction between a star and a planet. Radial velocity is one of the first successful way a star with a gravitational field that is much more powerful than a planet with less gravity than the star and its effects makes the star wobble and the size of the wobble can tell us how big or small the planet is. Another way of locating a planet is to find it during it transition, that is when it is in the directly between it host star and where it is being observed. The observer will notice a change in the light because of the planet blocking out the light from the host star. The best example of a planet being in transit is thinking of an eclipse, when our Sun is being blocked out we lose light for some time. When a planet is in this phase we are searching for shadows of other planets it is one of the best clues because the light curve indicates a lost in brightness. The light curve can give us a great deal of information about what size of the planet is or if there are more than one planet circling that star. The more light that is block will create a deeper light curve and that tell us that the planet is big. The longer the light is blocked out from the star also can tell us how far away from the host

These planets also known as, Exoplanet , are found outside our solar system and orbit around its host star; its said to be the most common stars in the Universe. The reason for this is because they exist with the habitable zones of their stars, where liquid water could pool on the surface of the planet and potentially support life. Many astrobiologists believe that in order for life to arise and survive, it must be found on a planet or moon within the habitable zone of a star. The size of the star is important as well; Stars that are much larger than the Sun have such short lifetimes, that it is unlikely that there would be enough time for any kind of life, particularly complex life, to develop. Planets in the habitable zone of small stars

There are a lot of planets in the Milky Way, but not all of them have potential to hold life. There are a few factors that influence the habitability of a planet. These are temperature, water, atmosphere, energy and nutrients. I will

The main topic I am so thoroughly interested in with Astronomy is exoplanets. A number of

Exoplanets, also referred to as extra solar planets, are planets which orbit around stars in planetary systems other than our own Solar System. The first exoplanet that was ever discovered was of PSR B1257+12 A in 1992, since then we have discovered approximately 1932 extra solar planets, 1222 planetary systems and 484 multiple planet systems. A wide range of techniques are used by astronomers to find exoplanets, most of which uses observation from Earth to deduce exoplanet locations and properties, features and conditions. There are also many reasons why the astronomers research into exoplanets, with one of the main reasons being the desire for humanity to leave Earth, as we would not be able to live in this world forever, whether it is due to induced causes like global warming or natural causes like the sun aging and eventually exploding as a supernova. Humanity’s time on Earth is finite, which is the main drive for scientists and astronomers alike to discover life as we know it on extra solar planets in other planetary systems. (Gammon 2013, Exoplanet.eu 2015, Phoenixpics 2009)

1993). One thing that differs from Earth is that there is no water liquid on the Venusian surface.