Instead, you use its orbital motion. From Newton's version of Kepler's Third Law of Planetary Motion, the orbital speed of an object in circular orbit and a little algebra, you can derive an equation to calculate the amount of mass (Mr) that lies within any circular orbit with a radius...
The orbital velocity of the satellite depends on its altitude above Earth. The nearer to Earth, the faster the required orbital velocity. At an altitude of 124 miles (200 kilometers), the required orbital velocity is a little more than 17,000 mph (about 27,400 kph). To maintain an orbit...
Heller R., Albrecht S.: How to determine an exomoon's sense of orbital motion., arXiv:1409.7245v1 [astro-ph.EP] 25 Sep 2014Heller, R. and Albrecht, S. (2014). How to Determine an Exomoon's Sense of Orbital Motion. ApJ, 796:L1....
"In the nine months it takes to get to Mars, Mars moves a considerable distance around in its orbit, about three-eighths of the way around the sun. You have to plan to make sure that by the time you reach the distance of Mars' orbit, Mars is where you need it to be! Practically,...
Use Newton's second law (F=ma) to determine the acceleration of the body. The resultant force is therefore 39N downward. For a 5-kg mass, the acceleration is therefore found as follows: 39N = F=ma = 5kg x a, so a = 7.8m/s^2. ...
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Similarly, the satellite’s antenna must be able to track the served area on Earth as it moves in its orbit. Satellites in MEO such as the O3b constellation have used mechanically steered antennas, possible due to their slower orbital speed. LEO satellites must use some...
What is the orbital period of Earth? What is an s orbital? How would one determine the distance to a nearby star? What is the shape of an f orbital? Saturn orbits the Sun at an average distance of 1.4 billion km. Calculate the orbital period of Saturn. Why is a 2d orbital not poss...
We know that humans thrive in 1g but not in microgravity, but we knownothingabout health in between. In 2021, I suggested how to clarify human futures beyond Earth.[22] We can determine our “gravity prescription” for good health by having people live in a long dumbbell-shaped station in...
On February 8, 2022, approximately 40 of the 49 Starlink satellites were reported to have lost altitude, leading to atmospheric re-entry. SpaceX reported that the orbital decay on Starlink satellites was considered to be linked to a geomagnetic storm tha