200 million years 4.4 bya Oldest known rocks on the Earth formed. Main sequence 50 million years 4.5 bya Sun becomes a main-sequence star. Thus the white dwarf Sun will gradually cool, growing dimmer and dimmer. Earth’s fate is less clear; although the Sun will envelop Earth’s current orbit, the star’s loss of mass (and thus weaker gravity) will cause the planets’ orbits to move farther out. At this point the density and temperature will become so high that the fusion of helium into carbon will begin, leading to a helium flash; the Sun will shrink from around 250 to 11 times its present (main-sequence) radius. Two billion years later, when the Sun has cooled to the 6000-8000K range, the carbon and oxygen in the Sun’s core will freeze, with over 90% of its remaining mass assuming a crystalline structure. One hypothesis supposes that vertical oscillations made by the Sun as it orbits the Galactic Centre cause it to regularly pass through the galactic plane. All remaining planets’ orbits will expand; if Venus, Earth, and Mars still exist, their orbits will lie roughly at 1.4 AU (210,000,000 km), 1.9 AU (280,000,000 km), and 2.8 AU (420,000,000 km).

The sources of dharma lie in the Vedas, from which the Hindu tradition draws its inspiration and guidance and relates eternal truths to the changing conditions of space and time. A Keplerian orbit is merely an idealized, mathematical approximation at a particular time. They will continue to orbit their star, their speed slowed due to their increased distance from the Sun and the Sun’s reduced gravity. The Solar System travels alone through the Milky Way in a circular orbit approximately 30,000 light years from the Galactic Centre. He has personally driven to the top of Mauna Kea and rates it as one of the most panoramic views in his travels to Hawaii. With careful selection of graduate school courses and experiences, one may prepare for an interesting and productive career in a related field, such as industrial research, education, and public information. One of the most important aspects of human life is their career and professional life.

They and the other remaining planets will become dark, frigid hulks, completely devoid of any form of life. Sun begins to form. This is a relatively peaceful event, nothing akin to a supernova, which the Sun is too small to undergo as part of its evolution. Historically, an important part of the scientific research cycle is to situate any research project within the landscape of the existing scientific literature. Astro, the first part of the word, comes from the Greek word for the star shape and also refers to outer space. Whether it was the ARRL or the FCC who first came up with the idea of Incentive Licensing depends on whose history you read, but there is no doubt the A-Double-R-L was instrumental in seeing this scheme become a reality. Fortunately, this was the first space telescope designed to be maintained and repaired by astronauts. Many past and current concepts for the continued exploration and colonization of space focus on a return to the Moon as a “stepping stone” to the other planets, especially Mars.

As the Sun dies, its gravitational pull on the orbiting bodies such as planets, comets and asteroids will weaken due to its mass loss. Afterwards, all that will remain of the Sun is a white dwarf, an extraordinarily dense object, 54% its original mass but only the size of the Earth. In 4 billion years, Andromeda and the Milky Way will collide, causing both to deform as tidal forces distort their outer arms into vast tidal tails. Although the vast majority of galaxies in the Universe are moving away from the Milky Way, the Andromeda Galaxy, the largest member of the Local Group of galaxies, is heading toward it at about 120 km/s. Its speed is about 220 km/s. Any observer present to witness this occurrence would see a massive increase in the speed of the solar wind, but not enough to destroy a planet completely. Almost all meteorites (see the Canyon Diablo meteorite) are found to have an age of 4.6 billion years, suggesting that the Solar System must be at least this old.