# 250 Kilometers Is How Many Miles

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Theoretically, Mars and Earth are closest when Mars is closest to the Sun (perihelion) and Earth is at its farthest (aphelion). That would put the two planets 33.9 million miles (54.6 million kilometers) apart - but thats never happened in recorded history, according to NASA (opens in a new tab).

## 250 Kilometers Is How Many Miles

The closest approach from Earth to Mars was in August 2003, when the two were 34.8 million miles (56 million km) apart. According to NASA, the two wont be that close until 2237.

#### India’s Rajpal Singh (2nd L) Celebrates With Teammates After Scoring Against Pakistan During Their Men’s Asia Cup Hockey Tournament In Kuantan, 250 Km (155 Miles) Northeast Of Kuala Lumpur, May 10, 2009

Mars and Earth are farthest away when they are both opposite the Sun and at aphelion. According to the New York Times, they may be 250 million miles (401 million kilometers) apart here (opens in a new tab). The average distance between Earth and Mars is 140 million miles (225 million km).

To understand how much the distance between Mars and Earth varies, we need to look at their orbits.

Neither Earths nor Mars orbits are perfectly circular, so the distance between them is constantly changing. Think of the planets as two cars on a race track, with Earth moving faster on the inner lane than Mars - completing two laps in the same amount of time it takes Mars to complete one.

A Mars opposition occurs when Earth reaches Mars and is between the Sun and the Red Planet. At a Mars opposition, from Earth, we see the sun setting in the west, Mars rising in the east, and the red planet visible in the night sky. Such protests occur every 26 months. Every 15 to 17 years, when the Earth passes between Mars and the Sun (its closest approach to the Sun), we see close oppositions on Mars.

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This NASA illustration shows Earth, Mars, and the Sun at opposition. (Image credit: NASA) (Opens in new tab)

The Red Planet makes an interesting target to observe in the night sky. It looks very bright and is visible even to the eye.

If youre looking for a telescope or binoculars to look at Mars, check out our guide to the best binocular deals and the best telescope deals. If you need imaging gear, see Best lenses for astrophotography and Best lenses for astrophotography.

A close approach provides a window of opportunity to launch missions to Mars. Here, NASAs Mars 2020 mission will launch from Launch Complex-41 on July 30, 2020, with the Perseverance rover. (Image credit: United Launch Alliance) (Opens in new tab)

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According to NASA, Mars approaches Earth every 26 months - the same frequency as opposition. According to Celestron (opens in a new tab), due to the mechanics of their rotation, it can happen a few days before or after whether Mars is moving away from the Earth and the Sun, or towards the Earth and opposition. Sun, respectively.

This time gives an opportunity to see the sky, but it is the best time to start crafting to the Red Planet. Many missions have taken advantage of their proximity to Mars, so you often see the launch of Mars missions (budget permitting) every two years.

In the year In 2020, the UAEs Hope mission was launched from Japans Tanegashima Space Center on July 19, Chinas Tianwen-1 mission from the Wenchang Satellite Launch Center on Hainan Island on July 23, and NASAs Mars-2020 from Florida on July 30. Endurance Rover. According to The Planetary Society (opens in new tab), this is the first time three different countries have launched a mission in the same window of opportunity.

The average distance between Mars and the Sun is 142 million miles (228 million kilometers). According to a NASA fact sheet (opens in a new tab), due to Mars ecliptic orbit, Mars is 128 million miles (206 million km) from the Sun at its closest (perihelion) and Mars is at its furthest. aphelion). 154 million miles (249 million km) from the Sun.

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The average distance between Mars and the Sun is 142 million miles (228 million kilometers). (Image credit: NASA) (Opens in a new tab) Measuring the distance between Earth and Mars

According to the Teachers Guide to the Universe (opens in new tab) from Princeton University, the distance between Earth and Mars was first determined by Giovanni Cassini in 1672 using the parallax method.

Cassini accomplished this by sending fellow astronomer Jean Richter to French Guiana to make the measurements while he was in Paris. He measured the position of Mars and triangulated these measurements with the known distance between Paris and French Guiana. Cassinis estimate was only 7% off todays more accurate measurements.

According to Universe Today, with several spacecraft currently orbiting the Red Planet, scientists can use the speed of light to determine the distance of Mars from Earth and the time it takes for signals to reach the Martian spacecraft. (Opens in a new tab)

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To find out how far Mars is from Earth, check out this guide (opens in a new tab) from The Sky Live. To better visualize the distance between Earth and Mars and the time it takes to travel between the two, this animation by James ODonoghue (opens in a new tab) is a great resource. You can learn more about missions to Mars at NASA (opens in a new tab).

Join our forums to discuss the latest missions, the night sky, and more! And if you have any suggestions, corrections or comments, let us know at: community@

Daisy Dobrevich joined as a reference writer in February 2022, having previously worked as a writer for our sister All About magazine. Before joining us, Daisy completed an editorial internship at the BBCs Sky at Night magazine and worked at the National Science Center in Leicester, UK, where she enjoys promoting science to the public. In the year In 2021, Daisy graduated with a PhD in Plant Physiology and has a Masters in Environmental Science. She is currently based in Nottingham. Converting distance to time per hour is a very common practice because it allows you to calculate travel time. To do this conversion, you need to know your vehicles average speed for the trip.

If given in miles, multiply the distance by 1.609 to convert to kilometers. For example, 86 miles would be 86 x 1,609 or 138,374 kilometers.

## Malaysia’s Jivan Mohan (l) Stops Bangladesh’s Sheikh Nannu During Their Men’s Asia Cup Hockey Tournament In Kuantan, 250 Km (155 Miles) Northeast Of Kuala Lumpur, May 11, 2009. Reuters/zainal Abd Halim (malaysia

Convert speed from miles per hour to kilometers per hour. If the speed is given in miles per hour, then multiply by 1.609. If the speed is measured in meters per second (m/s), multiply by 3.6. For example, a speed of 15 m/s is equal to 15 x 3.6 or 54 km.

Divide the distance (in kilometers) by the speed (in kilometers/hour) to calculate the time (in hours). In our example, the time is 138,374 km / 54 km / h = 2,562 hours.

To convert to minutes, multiply the decimal part of the hour number by 60. In our example, the decimal part is 0.562; 0.562 x 60 = 33.72 min. After rounding up to 34 minutes, 2,562 hours can be expressed as 2 hours and 34 minutes. A new online map resource lets you determine your driving radius, but you dont need a pencil, ruler or paper map.AP

Remember the old song 500 Miles From Home? Instead of moaning, think of it as a challenge and you can come up with some great ideas for a road trip.

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You can do it the old-fashioned way by calculating distances on a paper map using miles and yardsticks. But now there are free online map radius tools that show at a glance which destinations are within a certain distance.

Go to the website and go to the Options form. Type in the city where you started in the Set Radius by Place Name field.

Go through Latitude and Longitude and go to the Radius Distance section. Here, the sheet automatically sets the radius distance to 1000 kilometers, but you can reset it by entering the number of kilometers you want to drive in the miles box next to the kilometer box.

Scroll up to see the green circle on the map. Click the minus sign on the left and scroll down a few steps to see the cities in your driving range in more detail.

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Depending on traffic and highway speeds, most people can easily cover 500 miles in a day, so starting at that distance makes for some interesting choices. If you have a weeks vacation, its okay to drive to and from your destination on the first and last days.

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