Vietnamese photographer Thanh Ha Bui captured this incredible image in his parents’ back garden and, after spotting a line of super strong weaver ants marching across a branch, decided to test their legendary weightlifting skills. First experimenting with pieces of food and leaves, he eventually ended up with this incredible shot
Saturn’s hexagon is a persisting six sided cloud pattern around the north pole of the planet. It is created by a band of upper-atmospheric winds, and the sides of it are about 13,800 km (8,600 mi) long, which is longer than the Earth’s diameter. There’s a hurricane swirling within the hexagon.
(Images by the Cassini spacecraft)
I’m writing a speech in honor of Ana’s achievements.
The ending of the speech for my comm class will taking fake shots of vodka.
The transit light curve gives an astronomer a wealth of information about the transiting planet as well as the star. It is only for transiting exoplanets that astronomers have been able to get direct estimates of the exoplanet mass and radius. With these parameters at hand astronomers are able to set the most fundamental constraints on models which reveal the physical nature of the exoplanet, such as its average density and surface gravity. As mentioned above the transit events do not just give information about the exoplanet, but quite often also information about the star. With telescopes capable of high precision photometry, transit curve anomalies can say something about the activity of the star. An example of this is when an exoplanet crosses star spots (Fig. 2) [source]. This can be seen in the light curve as a small increase in flux due to the light of a cooler part of the star being blocked out.
With a very high precision light curve with a high Signal to Noise (S/N), the light curve can also be used to infer the presence of other planets in the system. Perturbations in the timing of exoplanet transits may be used to infer the presence of satellites or additional planetary companions [source,source].
Credit: Paul Anthony Wilson
A Jupiter-size planet around a distant star has given astronomers a rare glimpse into the effects of space weather beyond our solar system: a view of an alien world unleashing an intense plume of gas triggered by an eruption from its parent star.
HD 189733b is a gas giant planet similar to Jupiter, but orbits extremely close to its star, just one-thirtieth of the distance between Earth and the sun. While the parent star, named HD 189733A, is slightly smaller and cooler than the sun, the climate of the alien world is still exceptionally hot, with temperatures above 1,830 degrees Fahrenheit (1,000 degrees Celsius).
The exoplanet’s close proximity to its star also means its upper atmosphere is constantly battered by energetic extreme-ultraviolet and X-ray radiation. According to the researchers, this makes HD 189733b a fascinating place to study how stellar activity affects an alien planet’s atmosphere.
Despite HD 189733b’s extreme climate, the atmosphere alone is not hot enough to evaporate at such a staggering rate. Rather, the evaporation is thought to be caused by powerful doses of X-ray and extreme-ultraviolet radiation from the parent star. Based on their calculations, the star’s eruptions are 20 times more powerful than those on the sun, and HD 189733b likely receives 3 million times more X-ray radiation than Earth.
Credit: L. Calçada/NASA, ESA
This may be the most frightening thing I’ve ever seen