Neptune, the blue planet, orbits the Sun further out than Uranus at an median distance the 2.79 billion mile (4.49 billion km), which is 30 times additional out 보다 the Earth. In ~ this rate, Neptune take away a whopping 165 planet years to complete one orbit approximately the Sun.

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Planet Neptune (Source)

At this street from the Sun, what go a day and also a year top top Neptune look at like? If us were to ever before visit this distant planet, how long would it take it to acquire there?

Let’s uncover out!

How far Away is Neptune indigenous the Sun?

Neptune is in ~ a distance of 2.77 billion mile (4.46 billion km) when it is closest come the Sun and 2.82 billion miles (4.54 billion km) away when it is the furthest from the Sun.

At times, Pluto ‘crosses’ Neptune’s orbit and also remains within it for 20 years. At this times, dwarf world Pluto is closer to the sunlight than Neptune, but the planets never ever collide v each other due to the fact that they are always at various points in your orbits once this happens.

How much Away is Neptune indigenous the Earth?

Neptune is 2.7 billion miles (4.3 exchange rate km) away once it is closestly to earth and 2.8 billion miles (4.5 exchange rate km) once it is the furthest native Earth.

As the Earth and also Neptune orbit the Sun, the distance between them keeps changing. At time Neptune is behind the Sun, bring about the alignment of Neptune, the Sun, and also Earth, through the sunlight in in between Earth and also Neptune. In ~ this point, known as a solar conjunction, Neptune is as far away together it have the right to be indigenous Earth, at virtually 2.82 billion mile (4.54 exchange rate km).

As the street keeps changing, Neptune’s closest technique to planet occurs as soon as both planets room on the same next of the Sun. In ~ this time, well-known as opposition, planet is inserted in in between the Sun and also Neptune, reduce the distance in between the 2 planets to practically 2.7 billion miles (4.3 billion km).

When that is closest come Earth, Neptune shines in ~ magnitude 7.8, which method it is not visible to the naked eye. Also if you use a telescope to watch Neptune, its vast distance renders it virtually impossible to distinguish it as an ext than a point-like star.

Distance that Neptune indigenous Sun and also Earth in 2021

The adhering to table reflects how far away the earth Neptune is from Earth for each month in 2021. The street is taken at the 15th of each month.

Neptune is closestly to earth in September and also farthest in March, which are both bolded.


MonthAU*MilesKM
January30.49802,834,966,2024,562,439,804
February30.83112,865,929,7814,612,270,898
March30.91762,873,970,4594,625,211,125
April30.75792,859,125,4164,601,320,324
May30.39112,825,029,2264,546,447,778
June29.88962,778,411,8894,471,424,381
July29.40762,733,607,1904,399,318,145
August29.04312,699,724,7984,344,789,674
September28.91692,687,993,7754,325,910,406
October29.06162,701,444,4814,347,557,237
November29.44962,737,511,3344,405,601,261
December29.95192,784,203,0364,480,774,336
Data indigenous in-the-sky.org.

The following table mirrors how much away the planet Neptune is native the Sun because that each month in 2021, likewise based on the 15th of every month.

MonthAU*MilesKM
January29.92672,781,860,5494,476,974,467
February29.92622,781,814,0714,476,899,688
March29.92572,781,767,5944,476,824,869
April29.92512,781,711,8204,476,735,110
May29.92542,781,656,0474,476,645,351
June29.92392,781,600,2734,476,555,592
July29.92342,781,553,7954,476,480,793
August29.92282,781,498,0224,476,391,034
September29.92232,781,451,5444,476,316,235
October29.92192,781,414,3614,476,256,396
November29.92132,781,358,5884,476,466,637
December29.92072,781,302,8154,476,076,879
Data indigenous in-the-sky.org.

You have the right to see that the sport in street from the sunlight is not as significant as the street from Earth. This is due to the fact that Earth’s very own orbit about the Sun causes a greater readjust in the distance in between the 2 planets.

Over the food of 2021, Neptune moves fifty percent a million mile closer come our star.

*AU=Astronomical Units, i m sorry is the exact same as 92,955,807 miles, or 149,598,000 km. Learn more about astronomical Units.

How lengthy Would It take to Reach Neptune?

Voyager 2 is the only spacecraft that visited Neptune, and also it take it 12 year to gain there. Light, ~ above the other hand, travels to Neptune from planet in around 4 hours and also 4 minutes when the two planets space at your closest.

So far, in this article, we have actually learned the the distance from earth to Neptune at two important points in its orbit — one as soon as the earth is closest and also the other when it is the furthest. Let’s now look at the information of just how long that takes to get to Neptune.

There space two ways to go around this. First, we will certainly look at the time light bring away to reach Neptune indigenous Earth.

Next, we’ll board an imaginary spaceship and also see how long it will take united state to take trip to Neptune

Let’s go!

How long Does Light require to Travel indigenous Neptune to Earth?

Light travels the faster of all recognized objects due to the fact that it has no mass. Its rate is 186,282 miles per second. At this rate, light takes 499 seconds to with Earth indigenous the Sun, a distance known as an expensive Unit (AU).

Let’s take it a look in ~ the shortest, longest, and also the mean time for light come travel between Earth and also Neptune.

Shortest distance = 2.7 billion mile (4.3 billion km) = 29.04 AU

Calculation: 29.04*499 = 14,491 seconds = 4.03 hours.

Average = 2.76 billion mile (4.4 exchange rate km) = 29.60 AU

Calculation: 29.6*499 = 14,770 secs = 4.10 hours.

Furthest = 2.82 billion miles (4.54 billion km) = 30.1 AU

Calculation: 30.1*499 = 15,020 secs = 4.17 hours.

At its typical distance the 2.76 billion miles (4.4 billion km), light takes 4.1 hrs to with Neptune native Earth. As the planets orbit the Sun, this time varies in between 4.03 hours and 4.17 hours (242 minutes and also 250 minutes).

This also way that when you look at Neptune indigenous a telescope, you space looking at it as it looked at the very least 4 hours ago!

How lengthy Does it take a Spaceship to take trip to Neptune?

Only one spacecraft, Voyager 2, has visited Neptune therefore far. The traveled as close together 3,000 miles (4,950 km) over Neptune’s phibìc poles. Voyager 2 took 12 years to come at Neptune.

MissionLaunch DateReached NeptuneTravel Time
Voyager 2August 20, 1977August 25, 198912 years and also 5 days

How lengthy is a job on Neptune?

Neptune rotates v a speed of 2.68 km/s. At this speed, Neptune takes just 16 hrs to finish a rotation ~ above its axis — that’s just how long a work on the earth is.

Calculating the size of a work is done by functioning out a planet’s rotational speed, commonly by measure the rotational speed of the core. This is more tough for ice giants due to the fact that they have actually avery little solid main point engulfed by icy layers, do it challenging to obtain accurate measurements.

How lengthy is a Year ~ above Neptune?

Neptune takes 165 earth years to orbit the Sun. While a job on Neptune is much shorter than the on Earth, its year is much longer. This way that Neptune rotates much faster than Earth yet orbits the Sun more slowly.

Are There seasons on Neptune?

Neptune is tilted by 29 degrees. Its axial tilt merged with its an extensive year leader to 40-year-long seasons on the planet.

During summer, Neptune receives an ext sunlight on the hemisphere facing the Sun, and also scientists have observed that its cloud bands get brighter as summer progresses.

Most exciting is the Neptune experiences periods at all because it receives 900 times much less sunlight 보다 Earth does. The planet likewise hosts some extreme seasonal changes and also fierce winds of approximately 1500 km/h, the origins of which room unclear.

Summary

Neptune is the eighth, and also final, earth from the Sun and orbits our star at an median distance of 2.79 billion mile (4.49 exchange rate km). At this large distance, Neptune takes simply 16 hours to complete one rotation around its axis, however a an extensive 165 planet years to finish one orbit roughly the Sun.

Even in ~ this distance, Neptune experiences all 4 seasons — summer, winter, fall, and spring, together on Earth, other than each season stretches for 40 long years due to Neptune’s orbit.

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Voyager 2 is the only spacecraft that has actually visited Neptune therefore far, and it take it 12 year to get there.