All Questions
7
questions
2
votes
2
answers
183
views
Mass versus rotation Curves
Is there an equation that describes the relationship between the mass of the Galaxy and rotation curve?
I found V versus R graphs and equations that describe their relationship (kind of). But I ...
- 3,122
0
votes
1
answer
781
views
Why does a heavier object move in larger orbit in a circular motion? [closed]
In a non-planetary circular orbit, where centripetal force is given by the contact with the rotating tube wall instead of gravity, why does a heavier object tend to move in a larger orbit?
For ...
- 21
4
votes
1
answer
195
views
Kepler's first law; mathematical way of finding the eccentricity
We know that Kepler's first law of planetary motion is defined as:
$$\text{r}=\frac{\text{p}}{1+\epsilon\cos\left(\theta\right)}\tag1$$
Now, for $\epsilon$ I have (see wikipedia):
$$0\space<\...
- 103
3
votes
1
answer
192
views
Kepler's first law; mathematical way of thinking
I have Kepler's first law of planetary motion:
$$\text{r}=\frac{\text{p}}{1+\epsilon\cos\left(\theta\right)}\tag1.$$
Now, for $\epsilon$ I have:
$$0<\epsilon=\sqrt{1+\frac{2\cdot\eta\cdot\text{h}...
- 103
0
votes
1
answer
226
views
Is it possible to find the mass of a planet and its moon from only their diameter and the distance between them?
For example, a planet has a diameter of 200,000 km and its moon has a diameter of 20,000 km, the distance between them is 100,000 km. Would it be possible to find their masses?
- 1,060
0
votes
2
answers
1k
views
Remotely finding the mass of a satellite
I have a question similar to one I've asked earlier (Calculating mass of an orbiting body with force and acceleration), but without a specific formula...
How can you find the mass of a satellite body ...
- 99
2
votes
4
answers
4k
views
Is escape velocity the same for all objects?
Would a lighter-than-air craft in the mid atmosphere at 80,000 feet altitude need to achieve the same velocity to escape earth gravity as the space shuttle?
- 175