Astronomy Weekly Newsletter - Friday, August 29, 2014

Astronomy newsletter

Top new questions this week: Can we see the Big Bang happen if we look far enough? The observable universe is constantly expanding as more light from the Big Bang reaches us. This light has been travelling for billions of years, so we are looking at the universe as it was a few … big-bang-theory observable-universe   asked by Nirvik Baruah 6 votes answered by Walter 7 votes Is there a paper on galaxy mergers in clusters of galaxies? I'm looking for something to cite about galaxy mergers in clusters of galaxies. I need numbers on the frequency of mergers in the outer parts of galaxy clusters vs. the cluster center. In the center … galaxy cosmology   asked by con-f-use 5 votes The Existence of Natural Satellites in Geostationary Orbits While browsing through Physics SE, I noticed a question about satellites in geostationary orbit (unrelated to the one I'm asking here), and for a moment I interpreted it as referring to natural … orbit natural-satellites   asked by HDE 226868 5 votes answered by Walter 5 votes Time after sunset until star can be seen Given a star's apparent location and apparent magnitude, how how many degrees below the horizon must the sun be for the star to be visible to the naked eye for an observer on Earth at a specified … amateur-observing   asked by Double AA 2 votes answered by Jeremy 3 votes Are there stars that don't emit visible light? Are there stars that do not emit any light in the visible part of the EM spectrum? star light   asked by user2317 1 vote answered by Walter 3 votes World line coordinate finiteness If you trace two particles' world line backwards in time, according to current theory, both objects should converge at big bang. Would both objects arrive there simultaneously? Another way of asking … space-time big-bang-theory general-relativity   asked by frodeborli 1 vote answered by Walter 2 votes Star System Formation questions I'm making a game in which I'd like to randomly generate star systems. Which is cool. The trouble I'm having is working out exactly what limits I need to place on the generation. So far, the … formation planetary-formation   asked by David Murphy 1 vote answered by BanzaiAstronomy 2 votes Greatest hits from previous weeks: How to calculate Longitude from Right Ascension? Considering that a star of certain declination is crossing the local meridian at the observer's zenith at an unknown location on the earth. Here, the declination of the star is equal to the observer's … star amateur-observing observation fundamental-astronomy   asked by Karthikeyan KC 3 votes answered by AstroFloyd 2 votes Is it a coincidence that both the sun and moon look of same size from earth? The sun is huge when compared to moon. Despite the huge difference in their size and distance from earth, Is it purely coincidental that they both look almost the same from earth? moon earth sun   asked by Rajbir Jawanda 9 votes answered by Mitch Goshorn 16 votes

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