Cometary Thursday


Cameras on the Rosetta spacecraft have spotted a series of enormous pits on comet 67P/Churyumov-Gerasimenko that plunge hundreds of metres down into the body’s cold interior.

Scientists on the mission believe the pits formed in the same way as sinkholes on Earth, which appear out of the blue when the natural ceilings above underground caverns suddenly collapse under their own weight.

The comet pits are typically 200 metres across and reach down about the same distance into the comet’s body. Some of the holes may have formed in the distant past, but the walls of others are jagged and show no signs of erosion, suggesting they formed very recently.

The discovery of sinkholes shows that comets have substantial variations in their internal structure, a finding that rules out some theories of how the bodies form in the first place, from rubble left over from the birth of the solar system.



Well the “birth of the solar system” should maybe have been set aside in favor of the birth of the Universe, but I am not a scientific writer I just do a blog.


About Den

Always in search of interesting things to post. Armed with knowledge and dangerous with the ladies.
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22 Responses to Cometary Thursday

  1. º¿carol says:

    Hey, the motor home is really nice! Smaller than the ones I’ve been in, probably easier to drive and maneuver around. I like it! It’s really nice!


  2. Den says:

    I looked at over 30 RV’s, big and small with the small ones winning out for ease of parking, better gas mileage, smaller, cheaper tires, while sacrificing storage. This one comes with a platform that goes in the hitch, plus I have a motorcycle carrier that plugs in to the hitch also.
    It has a leak in the top which is common that I have to repair outside and in but otherwise it has only 43,000 miles on it, just been sitting a while, needs oil, filters etc. Then it will be liveable and ready for a road trip. Got to get the pickup done and sold too, not easy working in 95 degree temps so I will have to be careful there. Luckily I have the Fixer gene and the Sauna gene also.


  3. David B. Benson says:

    “Birth of the solar system” is correct.


    • Den says:

      How do you know it came from within our ‘solar’ system as a result of when ours was spawned or a chunk of rock that hurtled through space (the Universe) and was drawn in as it slowed, by gravitational pull here and here is where it remains trapped in a roundabout? Just curious.


      • David B. Benson says:

        There was only enough gas and dust to slow and trap an extra-solar wanderer at the beginning of the solar system. Some of the gas and dust would accrete. But I suppose that is possible, just unlikely compared to home grown.


  4. David B. Benson says:

    The simp grew up enough to fly a little. Parents now look after the young crow for a year.

    Also, a few almost Monarch butterflies.


  5. David B. Benson says:

    Webb for prez?


  6. David B. Benson says:

    Trip to the grocery store complete in the heat: 94+ °F.


  7. jimhitchcock says:

    The 4th of July, when we reenact blowing ourselves up with fireworks and hot dogs.

    I do love this country.


  8. Den says:

    The USA, blowing up stuff since 1776.


  9. David B. Benson says:

    Jupiter racing well ahead of Venus now.


  10. Den says:

    Time to retreat to LLamaland USA


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