Day: September 17, 2019

We Now Know What Smashed Into Jupiter Last Month

(E. Chappel/R. Hueso/M. Delcroix/DeTeCt) MICHELLE STARR 17 SEP 2019 Last month, we got the exciting news of a rare flash of light on Jupiter, bright enough to be seen through telescopes. According to a new analysis, the cause of this smash was a small asteroid, with a density consistent with meteors that are equal parts…

How Does the New Interstellar Object Differ From ‘Oumuamua?

Comet Borisov (left) versus ‘Oumuamua (right).Image: Gemini Observatory/NSF/AURA, the William Herschel TelescopeThe second interstellar object on record has visited our solar system, according to astronomical observations made in recent week. But how does this new visitor differ from ‘Oumuamua, the first interstellar object?Scientists have been eager to learn more about Comet C/2019 Q4 (Borisov) since…

Scientists identify previously unknown ‘hybrid zone’ between hummingbird species

Allen’s and Rufous hummingbirds in the northwest are hybridizing, and scientists hope that studying them may provide new insights into how biodiversity evolves. Credit: Brian Myers We usually think of a species as being reproductively isolated—that is, not mating with other species in the wild. Occasionally, however, closely related species do interbreed. New research just…