Space is Hard From ionizing radiation to micrometeoroids, space is a dangerous place. Most spacecraft, when they feel threatened, can autonomously enter into a protective operating mode call safe mode. Different spacecraft do different things in safe mode, but most turn off all non-essential components, like propulsion and the payload, to focus all energy on…
A Quick Estimate A few days ago I was invited to take part in a mock architecture study looking at Deep Space CubeSat missions. As a multi-body dynamics fanboy, my heart jumped at the possibility of using the interplanetary superhighway to preserve our meager delta-V budget. The downside of using the interplanetary superhighway is that…
Everything Orbits About Something In our solar system, Moons orbit around planets, which themselves orbit around the sun. Well, actual they orbit about the system barycenter, the combined center of mass between the two bodies. But can we get an object to orbit around a region without a barycenter? Yes! (Kinda) There are actually a…
Chaos I’ve recreated one of my favorite mathematical demonstrations below. Three double pendulums, all starting with near identical initial conditions, all rapidly diverging. I love this demonstration because it’s such a great example of chaotic dynamics. What is Chaos? Chaotic dynamics, in a nutshell, means that a system is extremely sensitive to initial conditions. That…
Recap In the last post we introduced the 3-body problem along with some constraints that turned it into the circular restricted 3-Body Problem (CR3BP). In the beginning of that post, I had a GIF that traced out a trajectory in the Earth-Moon system. In this post, we will derive the equations of motion for the Circular…
What is Journal club As a new grad student, I need to read a lot of papers. A rule of thumb for new grad students is to read 5-7 papers every week. As I read through them, I highlight statements, leave comments in the margins, and write up a small note about what I thought…
So You’re Thinking about Graduate School I got into graduate school this year, and a lot of friends in their sophomore and junior year keep asking me about the process. I figure if so many people in real life are asking me about grad school, people online would probably also benefit from hearing about the…
