The Gemini Planet Imager, a new telescopic instrument designed to find, image, and study faint, young planets orbiting bright stars, has discovered its first exoplanet: a young Jupiter-like planet called 51 Eridani b which orbits the star 51 Eridani, about 100 light-years away. Thought to be similar to a younger version of Jupiter, it should help astronomers learn more about how planetary systems form.
One of the primary goals in the search for exoplanets is to, hopefully, find an Earth analog or “Earth twin,” an alien world similar to our own. That search is still ongoing, but getting closer – yesterday NASA announced a new exoplanetary discovery that could be described as “Earth’s bigger and older cousin” – Kepler-452b.
Discovering new exoplanets has become rather routine in the last few years, but determining just what conditions exist on any of them is naturally more difficult, since they are so far away. But astronomers are making advances in this area as well, and now they have found the first evidence of changing temperatures – and possible volcanic activity – on a distant super-Earth exoplanet.
The search for, and discovery of, exoplanets orbiting other stars has become a full-fledged endeavour in recent years, with thousands found so far and more being discovered practically every week. Now, NASA wants to take it a big step further by establishing a coalition of research groups and disciplines tasked specifically with this purpose.
The search for exoplanets may one day get a lot more glittery. It sounds a bit like science fiction, but a new NASA proposal called Orbiting Rainbows would use glitter-like materials to help image some of those far-away worlds, which could enable high-resolution imaging at a fraction of the cost.
Researchers at Cornell University are taking a new approach to the search for alien life: looking for habitable planets older than Earth, “old Earth analogues,” which may be nearing the end of their habitable lifetimes. Astronomers would search for biosignatures from worlds much older than Earth, where lifeforms are dying off due to circumstances such as the planet’s star expanding in its old age, gradually heating the planet to a point where life is no longer possible.