Science
‘Echo Mapping’ in Faraway Galaxies Could Measure Vast Cosmic Distances – Jet Propulsion Laboratory
Matter swirling around supermassive black holes creates bursts of light that “echo” in nearby dust clouds. These traveling signals could serve as a new cosmic y…
Matter swirling around supermassive black holes creates bursts of light that “echo” in nearby dust clouds. These traveling signals could serve as a new cosmic yardstick.
When you look up at the night sky, how do you know whether
the specks of light that you see are bright and far away, or relatively faint
and close by? One way to find out is to compare how much light the object actually
emits with how bright it appears. The difference between its true luminosity
and its apparent brightness …
-
General7 hours agoAustralian celebrity chef Peter Russell-Clarke dies aged 89
-
General24 hours agoParis opens River Seine for public swimming for first time since 1923
-
General22 hours agoWest Indies vs Australia live: Second Test, day three from Grenada
-
General21 hours agoDr Daniel Hunt, Michael Long and Christine Anu celebrated at 50th NAIDOC Week Awards