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A Century of Staring at the Sky: Constraints on Star-Planet Interactions from the DASCH project

Caption: H. A. Sawyer loading plates into the Harvard 16” Metcalf Doublet telescope. Picture from http://hea-www.harvard.edu/DASCH/telescopes.php Paper Title: 100-year DASCH Light Curves of Kepler Planet-Candidate Host Stars Authors: S. Tang et al First Author’s Affiliation: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; Kavli Institute for Theoretical Physics, Santa Barbara, CA; California Institute of Technology, Pasadena, CA […]

A Big Step Backward for Time Domain Astronomy

Astronomers at Harvard are working to digitize over 500,000 historic photographic plates obtained between 1985 and 1993. With about ~8% of the plates scanned they are already offering us a unique glimpse into the variability of the universe on a 100 year time scale.

The Invisible Monster Has Two Faces

Every 27.1 years, the ε Aurigae system gets dimmer and stays dim for two years. What is causing the dip in brightness? Have Hoard et al. uncovered the invisible monster?

Quakes on Jupiter: a new look at a familiar object

In this paper, techniques from helioseismology – using waves to learn about the interior of the Sun – are applied to yet another object: Jupiter. Because Jupiter is largely a fluid, like the Sun, astronomers have expected it to show global seismic behavior since the mid-1970s; the signal was even theorized to be about the same magnitude as solar oscillations. However, attempts to detect Jupiter’s global oscillations in the 80s and 90s were largely unsuccessful.

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