New answers tagged planetary-science
2
Actually, it's possible to use perfluorocarbons to create the necessary greenhouse effect: https://science.nasa.gov/science-news/science-at-nasa/2001/ast09feb_1. These are much stronger greenhouse gases than CO2 and are also non-toxic. Of course, terraforming would still be an expensive and long-term project, even using these gases.
6
In addition to the problems already mentioned, Venus rarely passes between the Earth and the Sun, and when it does, it only lasts for a few hours: https://en.wikipedia.org/wiki/Transit_of_Venus. That link also contains a good image that shows the difference in size between Venus and the Sun: the former is a tiny black dot compared to the latter. Any cooling ...
4
The attenuated material from Venus' atmosphere would create a
temporary interplanetary "space haze" blocking solar radiation on the
closest planet opposite the source of the solar radiation (Earth)
The Sun is so huge compared to the tiny rocket planets like Venus and Earth and the distances between them are so big compared to the diameters of the ...
8
While the earth's magnetic field was disturbed by the tests mentioned, I don't think there's any sign that the field as a whole was degraded, certainly not on a timescale that would materially affect atmospheric escape.
Venus already has no intrinsic magnetic field to be disrupted. The existing field is induced by the sun's effect on the planet. If it were ...
1
In this answer dimensionless gravitational multipolar moments for the Earth are given. It is noted there that after the quadrupolar contributions $J_2, J_{2,2}$ (but not $J_{2,1}$) the next largest multipoles are $J_3, J_4, J_{3,1}$; all of the latter are similar in magnitude to each other and three orders of magnitude smaller than the quadrupolar terms but ...
6
Here's the result obtained with NAIF's SPICE library:
The graph shows the azimuth and the elevation of Charon as seen from an observer on the surface of Pluto with position: latitude = 45° and longitude = 0 (az and el are corrected for one-way light time and stellar aberration).
This is probably a better view:
You would not see any change in azimuth or ...
5
Here is a paper with information on Pluto and Pluto's moons. I believe much of the info comes from the New Horizons mission. S. A. Stern, the P.I. for New Horizons, is listed as lead author.
Here's a screen capture from the top of page 3 of this pdf:
0 inclination as well as near zero eccentricity.
There'd be no bobbing and weaving like in your gifs of our ...
-4
Charon was discovered by United States Naval Observatory astronomer
James Christy, using the 1.55-meter (61 in) telescope at United States
Naval Observatory Flagstaff Station (NOFS).[19] On June 22, 1978, he
had been examining highly magnified images of Pluto on photographic
plates taken with the telescope two months prior. Christy noticed that
a slight ...
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