Gravitational waves could help us find out how fast the expansion of the universe is accelerating

Gravitational waves emitted when distant black holes collide and merge, ringing the very fabric of space-time like bells, could be used to help measure how fast the universe is expanding, according to a new study. Since the late 1990s, astronomers have known that not only is the universe expanding, but it’s doing so at an … Read more

Gravitational waves could help us find out how fast the expansion of the universe is accelerating

an artist's illustration of gravitational waves, showing spiral ripples on a gridded surface emerging from two merging spheres

an artist’s illustration of gravitational waves, showing spiral ripples on a gridded surface emerging from two merging spheres Gravitational waves emitted when distant black holes collide and merge, ringing the very fabric of space-time like bells, could be used to help measure how fast the universe is expanding, according to a new study. Since the … Read more

The proposed Stevenson Expressway expansion brings activists and neighbors together with airline concerns about increased pollution

The proposed Stevenson Expressway expansion brings activists and neighbors together with airline concerns about increased pollution

MCKINLEY PARK As Chicagoans experienced some of the worst air quality in the world due to smoke from Canadian wildfires, environmental activists encouraged Southwest Side neighbors during a meeting Tuesday to work with them to address concerns raised by another concern: the proposed expansion of the Stevenson Expressway. Representative Theresa Mah held the meeting Tuesday … Read more