Just a side note, that dimming of a galaxy is easy. Actually, it's impossible. Every star inside a Dyson sphere still radiates in IR. 30 years ago they have already looked for large IR sources and found nothing.<div><br>
</div><div>One must disassemble a star to stop all EM emissions. You just can't dim it!</div><div><br></div><div>- Thomas<br><br><div class="gmail_quote"><br></div></div>