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For one, if you look at the example questions that define the Astronomy proposal, none of them are on topic for the Space Exploration site.
Astronomy is largely an academic site about the observation and
scientific study of celestial objects. Space Exploration SE is a much
more applied site about the engineering principles and challenges of
physical space exploration.
I would not suggest mixing the two.
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We can use light absorption technique to determine which element this atom belongs to.
When light meets an atom it is absorbed. The particles of light (photons) are absorbed by electrons and electrons jump to a higher energy state. When electron jump to a lower energy state they emit photons. If we observe continuous spectrum of a light that comes from this atom we can see black stripes. These stripes are unique for each atom and represent these jumps that electron made. By comparing observed stripes with those that were found in a laboratory we can figure out which element this atom belongs to.
1. Lack of Jobs
2. Migration that occurs when people follow fellow citizens to another location
3. China
The Islamic Republic of Pakistan has occasional problems with coastal flooding's by the cyclones but it is relatively rare. On the other side, the People's Republic of Bangladesh experiences annual flooding's by the cyclones, they cause lots of problems and casualties. The countries relief is a big disadvantage because the coastal region, as well as towards the inland, the relief is dominated by lowlands, thus the water can freely flood a very big prat of the country.
