How Much Is 7 Kilometers – Biological Sex: Female Male Height: Feet cm Inches Speed: Very Slow Walk (<3 km/h) Slow Walk (3 km/h) Moderate Walk (5 km/h) Active Walk (6.5 km/h) Jog ( 8 km) /h) Jog (9.5 km/h) Fast run (12 km/h) Very fast run (16 km/h) Km count: Calculate calories burned? Remember to include your weight: lbs kg stone (optional)? Activate this option to save the numbers you enter in the Calculate form so they will appear on your next visit. Information is stored on your device in a cookie. We do not store any information on our servers.
Convert kilometers to steps using your personal measurements and pace and find out how many steps you take for every kilometer you run.
How Much Is 7 Kilometers
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Earth revolves around the Sun in a slightly oval orbit called an ellipse. Hence, the distance of the planet from the Sun changes throughout the year.
However, the average distance from Earth to the Sun is about 93 million miles (150 million kilometers). Scientists also call this distance an astronomical unit (AU).
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The universe is a big place, and sometimes researchers use astronomical units to tell how far away celestial objects are from each other. For example, Jupiter orbits at a distance of 5 AU from the Sun.
In early January, Earth reaches its closest point to the star. Astronomers call this point perihelion, and Earth is about 91.4 million miles (147.1 million km) from the Sun at this time, according to NASA.
Remember that the distance between the Earth and the Sun does not determine the seasons we experience; The seasons are determined by the tilt of the planet’s axis. That is why the season occurring in the Southern Hemisphere of the Earth is always opposite to the season in the Northern Hemisphere.
Six months after perihelion, Earth reaches its greatest distance from the star, known as aphelion. At this time, the planet is approximately 94.5 million miles (152.1 million km) from the Sun. Aphelion occurs in early July.
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The International Astronomical Union (IAU) is an international non-profit organization responsible for, among other things, defining the astronomical constants. In August 2012, IAU members voted to approve a more accurate measurement of 1 AU.
An astronomical unit is now more precisely defined as “a regular unit of length equal to 149, 597, 870, 700 meters”. This roughly translates to 92,955,807 miles (149,597,871 km).
Why was this decision necessary? The equation that previously determined the value of AU depends on information such as the mass of the Sun. But that value changes because the star continues to convert its mass into energy, according to a 2012 Nature report.
Einstein’s theory of general relativity throws a wrench in AU’s estimation because time is relative to the observer’s location in the solar system. This problem complicated the work of planetary scientists working on models of the solar system.
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The value recently adopted by the UAI is measured using the speed of light in a vacuum, which is constant.
The first known person to measure the distance to the Sun was the Greek astronomer Aristarchus of Samos, who lived around 310 BC. 230 BC He used the phases of the moon to measure the sizes and distances of the sun and moon.
When a crescent moon appears in Earth’s sky, the center of our planet and the center of the moon form a line that forms a 90-degree angle with another line from the center of the moon. of the sun. Using trigonometry, Aristarchus could determine the hypotenuse of a triangle based on these two imaginary lines. The value of the hypotenuse gives the distance between the Sun and the Earth.
Although imprecise, Aristarchus provided a simple understanding of the sizes and distances of the three bodies that led him to conclude that the Earth revolved around the Sun, some 1,700 years before Nicolaus Copernicus proposed a heliocentric model of the solar system.
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In 1653, astronomer Christian Huygens calculated the distance from the Earth to the Sun. Like Aristarchus, he used the phases of Venus to find the angles of the Venus-Earth-Sun triangle. His precise measurements of exactly what the AU would be were possible thanks to the presence of the telescope.
By guessing (correctly, accidentally) the size of Venus, Huygens was able to determine its distance from Earth. Knowing this distance and the angles formed by the triangle, we were able to measure the distance from the Earth to the Sun. However, since Huygens’ method was somewhat speculative and not entirely scientifically sound, he generally does not get credit.
In 1672 Giovanni Cassini used a method involving parallax or angular difference to find the distance to Mars while simultaneously calculating the distance to the Sun. While in Paris he sent a colleague, Jean Richter, to Cayenne in French Guiana (near Gauro, northwest of the center of present-day Guyana). At the same time, they both measured the position of Mars relative to the background stars and triangulated those measurements with the known distance between Paris and French Guiana. Once they had the distance to Mars, they could also calculate the distance from Earth to the Sun. Because his methods were so scientific, Cassini usually gets the credit.
These techniques also explain why astronomers continue to use the distance from Earth to the Sun to interpret the solar system.
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“Expressing distances in astronomical units has allowed astronomers to overcome the difficulty of measuring distances in physical units,” said astronomer Nicole Capitine of the University of Paris. “Such a practice was useful for many years because astronomers couldn’t accurately measure angles with distance measurements in the solar system.”
At the center of the solar system is the Sun. All bodies in the solar system – planets, asteroids, comets, etc. – around it at different distances.
Mercury, the closest planet to the Sun, comes within 29 million miles (47 million km) in its elliptical orbit, while objects in the Solar System’s icy Oort Cloud are within 9.3 trillion miles (15 trillion km). )
Everything else falls in between. For example, Jupiter is 5.2 AU from the Sun. Neptune is 30.07 AU from the Sun.
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According to NASA, the distance to the nearest star, Proxima Centauri, is about 268,770 AU. However, to measure long distances, astronomers use light years, or the distance light travels in one Earth year, which is 63,239 AU. So Proxima Centauri is about 4.25 light years away.
Watch a video explaining Aristarchus’ approach to calculating the distance from Earth to the Sun. NASA’s Sun Fact Sheet provides basic statistics about our star and its Solar System Exploration page provides details on solar science and solar missions. You can also explore the cosmic distances of the solar system and beyond with NASA.
Join our forums to keep up with the latest missions, the night sky, and more! If you have a topical tip, correction, or comment, let us know at: community@.
Doris is a science journalist and contributor. She holds a BA in Sociology and Communication from Fordham University in New York. His first book was published in association with the London Mining Network, where his love of science writing was born. His interest in astronomy began in childhood when he helped his sister build a model solar system in the Bronx. He got his first chance to write about astronomy as an editorial intern and continues to write about all things for the website. Dorris has also written about microscopic plant life for the Scientific American website and whale calls for their print magazine. He has also written about ancient humans in reverse, with stories ranging from recreating the cuisine of Pompeii to how to map the Polynesian expansion through genetics. He currently shares his home with two rabbits. Follow her on Twitter at @salazar_elin. Square kilometer (international spelling used by the International Bureau of Weights and Measures) or square kilometer (US spelling), symbol km2, square meter, SI unit of area or area.
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