Statement of the Problem The problem you want to solve is called the Kepler problem. In your formulation of the problem, you're starting out with the Cartesian orbital state vectors (also called ...

The U.S. Vanguard rocket reached orbit three times with a first stage thrust of only 125 kN. The first stage of the three-stage Vanguard Test vehicle was powered by a GE X-405 28,000 pound (~125,000 ...

Kirchhoff's law is only valid for objects in radiative equilibrium. The emissivity and absorptivity of a material are the same for a given wavelength, but can vary dramatically for different ...

Background and Physics Note that there are actually two different but related types of actuators that use conservation of angular momentum1 to control a spacecraft's attitude (both of which may be ...

Currently unclear According to the Verge: It's possible that the [static fire] test could come early next week. But the Falcon Heavy’s launchpad is located at NASA’s Kennedy Space Center, and limited ...

This answer assumes that you start in a circular orbit of radius $r$ and speed $v_\text{circ}=\sqrt{\mu/r}$. If you push the ball along the direction of the orbit, it will go into an elliptical orbit ...

We can compute the power required to maintain speed as: $$P=\frac{C_D}2\rho A v^3$$ Assuming the hypersonic drag coefficient is around $1$ and that the atmospheric density is $1\%$ of Earth's, we ...

Computers on the ISS do not rely on UNIX/POSIX time, they rely on GPS time. Broadcast time is the time broadcast from ISS computers that is intended to be indicative of current time. The broadcast ...

The paper does not describe how the calculations for the tether are done, but I can make a guess. We take a small piece of the tether with mass $\delta m$ and length $\delta r$, at distance $r$ from ...

I agree with Ingolifs' answer; you can create a porkchop plot for a transfer between any two orbits. For an Earth-Moon porkchop you could pick either a point on the Earth's surface or a particular ...

According to the press conference: ... that gold umbilical, that's what's transferring all the information between the rover and the descent stage, including this video; this picture is coming down ...

I used the paper Wavelength dependency of the Solar limb darkening for solar limb darkening data. It uses the following model for the normalized brightness distribution across the disk of the Sun: ...

First off I'll note that the linked article doesn't actually claim that Triana DSCOVR is the first spacecraft since Apollo to see the whole daylit side of Earth. The relevant quote (emphasis mine): ...