Find the current distance to the center of Venus from your geo location:

Find the distance to the center of Venus as observed from a point on the surface of the Moon:

Plot the distance between the centers of Jupiter and Earth, between years 2015 and 2030:

Find the distance to the center of Jupiter as currently measured from the center of Mars:

This can also be expressed in these alternative forms:

Find the distance to the center of Jupiter from a point on the surface of Venus:

Compare with the distance between centers:

The difference is smaller than the radius of Venus, depending on the current geometric configuration:

Use geo entities for locations on the surface of the Earth or entities representing solar system features:

Compute the between the Sun and the solar system barycenter:

Compute the distance for the next 100 years, in units of gigameters, or millions of kilometers:

Compute distances to a list of astronomical objects:

The result is given in QuantityArray form:

Use Normal to convert it to a list of Quantity distances:

Construct a function that computes the geometric distance between the centers of Jupiter and Earth for a given Gregorian year:

Plot that distance between years 2020 and 2026:

Find the instant of closest approach in 2022:

Convert to the standard Gregorian calendar:

This is the distance between the Earth and the Sun for day d of year 2022:

Due to the eccentricity of Earth's orbit, the distance oscillates around 1 AU during a year:

The perihelion of a planet is defined as the moment of closest approach to the Sun:

In 2022 it happened on January 4, around 7am GMT:

The aphelion is defined as the moment of maximum distance to the Sun:

In 2022 it happened on July 4, also around 7am GMT:

Find the distance to the star Vega:

Compare to the distance observed from the Sun:

It oscillates around 1 AU as the Earth orbits around the Sun during a year:

The distance from the Sun also changes in time, due to proper motion of the star:

The distance is decreasing about 2.5 au per year, as reflected by the negative radial velocity of Vega:

Compare the relative size of the Sun as currently observed from the different planets:

AstroDistance[astro,obsrvr] is equivalent to AstroPosition[astro,obsrvr]["Distance"]:

AstroDistance[astro₁,astro₂] takes into account the time that light takes to propagate from astro₁ to astro₂. Compute the distance at which Jupiter can be seen from Mars on this date:

This is the time that light takes to travel that distance:

This is the distance without taking into account that Jupiter moves during that time:

The difference is of the order of 10,000 miles:

This is the distance at which Mars can be seen from Jupiter at the same instant:

These results do not coincide:

However, the computation without light-time correction does coincide:

Use GeoPositionENU to compute the Euclidean distance to Principe Island from your location:

GeoDistance gives distances on the surface of the Earth, which are therefore longer:

Compare the Euclidean distance with the distance given by AstroDistance:

Deactivate all astrometric corrections to obtain full agreement: