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You probably want the distance as measured by static observers (particularly $r=\textrm{const}$, $\theta=\pi/2$, $\phi=0$), then it is $\int(1-2M/r)^{-1/2}dr$. But if you want the distance as measured by "raindrop" observers (who fell from rest far away from the black hole), then it is simply $L$.
We can use orbital velocities nowadays to calculate average distances from the Sun. In some cases, we can use the light travel time to orbiting satellites to calculate distances very accurately, too. For nearby stars, the main method is to measure the change in position of the star as the Earth moves across its orbit.
With the distance calculator distance.to you can easily determine distances between world-wide locations. Simply enter any desired location into the search function and you will get the shortest distance (air line) between the points, the route (route planner) as well as all important information.
Following code block shows how to calculate the difference in number of days between two dates using MomentJS. var now = moment(new Date()); //todays date. var end = moment("2015-12-1"); // another date. var duration = moment.duration(now.diff(end)); var days = duration.asDays();
This distance calculator can find the fastest distance between any two locations. Enter the source and destination to calculate the distance and then check for the fastest road distance between the two locations.
The Distance Calculator can find distance between any two cities or locations available in The World Clock. The distance is calculated in kilometers, miles and nautical miles, and the initial compass bearing/heading from the origin to the destination.
How do we know how far away objects are in space, and what units of measurements are used in astronomy for determining these distances?
