Showing blog posts tagged with Hayden Planetarium
by AMNH on
A new model shows how an elusive type of black hole can form in the gas surrounding its supermassive counterparts.
In research published in the Monthly Notices of the Royal Astronomical Society, scientists from the American Museum of Natural History, the City University of New York (CUNY), the Jet Propulsion Laboratory of the California Institute of Technology, and the Harvard-Smithsonian Center for Astrophysics propose that intermediate-mass black holes—light-swallowing celestial objects with masses ranging from hundreds to many thousands of times the mass of the Sun—can grow in the gas disks around supermassive black holes in the centers of galaxies. The physical mechanism parallels the model astrophysicists use to describe the growth of giant planets in the gas disks surrounding stars.
by AMNH on
Astrophysicist Jackie Faherty is blogging about the upcoming transit of Venus, which will take place next week. In her first post, she explains what the transit is, when it occurs, where she will be observing it—and where New Yorkers can catch a glimpse of the phenomenon.
A rare astronomical event is upon us: our sister planet Venus is about to transit our Sun. Depending on your geographic location, this means that the distant planet will glide across the face of the Sun appearing as a small black dot for several hours. Just like the Moon will sometimes pass between the Earth and the Sun, causing a solar eclipse, so do the innermost planets Venus and Mercury. However, since Venus and Mercury are many times more distant to us than the Moon, and since their orbits are not perfectly aligned with that of the Earth, transits of the inner planets are far more rare than solar eclipses and the shadows they cast are smaller. But the event is no less dramatic and unfolds over several hours rather than mere minutes.