New answers tagged

6

Here's a rough estimate. From the curves at top left of the plot in figure 1 in this paper, we can expect on average, per year per million km2 of earth surface, 4.5 meteors, weighing 31 grams ("log m" -- base 10, not base e, which would mean 7 grams). Heavier ones are rarer. Your 500 m diameter balloon's projected area is about 0.2 km2. So the average ...


3

We can probe this matter a little more in-depth. This introductory reference describes all the giant or Jovian planets, noting that only the two more massive ones, Jupiter and Saturn, are made primarily of hydrogen and helium. Uranus and Neptune, which did not have as much material to work with and did not become powerful enough to draw large proportions ...


0

First of all, the distances in the solar system are absolutely tiny compared to the distances between stars. To the casual observer, the celestial sphere (by which I mean everything in the sky except for the Sun and planets) will look absolutely identical to how it does on earth, or pluto for that matter. From a specific arbitrary point on mars, the sky ...


3

Assuming the methane stays in orbit around the Earth as indicated by uhoh, it will then not do much else. Wikipedia has a fairly extensive article about methane in the atmosphere, and it mentions that the primary reaction of methane in the atmosphere is oxidation by hydroxyl radicals. Because the hydroxyl radicals come from water and water in our ...


1

Immediate events Start was scheduled for June 11th. But on this day, "Vostok-5" did not go into space. The prognosis came: powerful solar flares are expected, at which the radiation dose may exceed the dangerous X-ray threshold. The start was appointed both on June 12 and June 13, but the specialists of the Sun Service did not give the go-ahead. Finally, ...


Top 50 recent answers are included