XKCD "WHAT IF" is generally awesome, but today was particularly awesome for those of us who like math and like The Proclaimers and think space is really cool... so me.

XKCD "WHAT IF" is generally awesome, but today was particularly awesome for those of us who like math and like The Proclaimers and think space is really cool... so me.

USS Enterprise NCC-1701-B circa 2330, the Enterprise served as a test bed for the proposed refit of the Excelsior class Heavy Cruiser to improve speed and offensive capabilities.  The test failed and all resources were allocated to the Ambassador class.  The Enterprise was decommissioned after the test after the experimental pieces were removed and it was placed on static display at the Starfleet Museum orbiting Terra Prime

USS Enterprise NCC-1701-B circa 2330, the Enterprise served as a test bed for the proposed refit of the Excelsior class Heavy Cruiser to improve speed and offensive capabilities. The test failed and all resources were allocated to the Ambassador class. The Enterprise was decommissioned after the test after the experimental pieces were removed and it was placed on static display at the Starfleet Museum orbiting Terra Prime

Predicted appearance of non-rotating black hole with toroidal ring of ionised matter, such as has been proposed[8] as a model for Sagittarius A*. The asymmetry is due to the Doppler effect resulting from the enormous orbital speed needed for centrifugal balance of the very strong gravitational attraction of the hole.

Predicted appearance of non-rotating black hole with toroidal ring of ionised matter, such as has been proposed[8] as a model for Sagittarius A*. The asymmetry is due to the Doppler effect resulting from the enormous orbital speed needed for centrifugal balance of the very strong gravitational attraction of the hole.

Moon glow-in-the-dark poster by Atomic Printworks for 77 Industries. 	A glow-in-the-dark poster showing the full moon as seen from the Earth. This poster is printed using a luminous phosphorescent coating so that it glimmers in the dark - just like the moon itself. 	The poster also includes a series of lunar facts and figures on radius, mass, orbital speed and gravity for budding astronomers. As popular with adults as it is with children. 	Printed in the UK on 200gsm coated paper using a…

Moon glow-in-the-dark poster by Atomic Printworks for 77 Industries. A glow-in-the-dark poster showing the full moon as seen from the Earth. This poster is printed using a luminous phosphorescent coating so that it glimmers in the dark - just like the moon itself. The poster also includes a series of lunar facts and figures on radius, mass, orbital speed and gravity for budding astronomers. As popular with adults as it is with children. Printed in the UK on 200gsm coated paper using a…

Redstone-Mercury: yes, Shepard and Grissom rode that tiny thing into space. Couldn't even reach orbital speed.

Redstone-Mercury: yes, Shepard and Grissom rode that tiny thing into space. Couldn't even reach orbital speed.

The Smallest Galaxies In The Universe Have The Most Dark Matter  “But if you were to ask how much total mass you need in this volume of space to keep these stars moving at that orbital speed, the answer is shocking: you need hundreds of thousands of solar masses worth of dark matter! Put that all together, and it means you need over a thousand times as much dark matter as normal matter in these extreme cases.

The Smallest Galaxies In The Universe Have The Most Dark Matter “But if you were to ask how much total mass you need in this volume of space to keep these stars moving at that orbital speed, the answer is shocking: you need hundreds of thousands of solar masses worth of dark matter! Put that all together, and it means you need over a thousand times as much dark matter as normal matter in these extreme cases.

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