More than 50 years ago, a Norwegian astronomer named Sjur Refsdal outlined an interesting new method for calculating the Hubble constant. Last November, astronomers found the perfect test case.
Cepheids are bright enough that we can use them to measure distances to other galaxies, but their luminosities also makes detecting their companions particularly difficult. So how do astronomers find their uncover their secret partners? Today’s paper takes a look…
Planetary rings such as those around Saturn are fascinating features. Recent observations also reveal evidence for rings around exoplanets, but it’s a difficult task to distinguish these planets from ringless planets. This Astrobite presents a technique, which simplifies the search for candidates. Even better, the developed code is publicly available and allows you going out to look for candidates for exoplanetary rings.
How can we measure the temperature of the Universe across cosmic epochs? Recent data from Planck suggests that the Universe’s cooling history is consistent with the Big Bang model.
A new analysis technique, that fits simultaneously for light-curve systematics and transit signals, finds 36 planet candidates in the K2 dataset — Kepler is still in the game!
Most exoplanets are and have been detected by the transit method. Maybe, we can improve the method even further by drawing conclusions from the recent Venus transits in 2004 and 2012.