• Question: * does every black hole contain a singularity ? * does sound travel faster in space ? *when do our planets all line up ?

    Asked by bluemarshmellos to RocketRich, Jenn, Floris, Elie, Col Op on 7 Mar 2016. This question was also asked by Lebron James.
    • Photo: Elie Allouis

      Elie Allouis answered on 7 Mar 2016:

      Wow, lots of questions 🙂
      – Yes a black hole IS a gravitational singularity where mass is infinite – as far as our understanding of it is correct
      – Well, sorry to say, that sound does not much have a say in space. Because there is no air, sound cannot travel…
      – As you may now, recently 5 of the large planets were aligned (Mercury, Venus, Mars, Jupiter and Saturn). The alignment is very much down to the orbits of each planet and occur very rarely. On May 6, 2492, all 8 planets and Pluto will be pretty much “aligned”. But since they are in slightly different inclinations so this is as close as you could get.