Search

Wobbles in the Sky reveal a New Moon



Astronomers working in New York have discovered the first exomoon to be 'seen' from earth.

How they did so is interesting. The various planetary systems discovered around distant stars (known as exo-planets) - and there are several thousand of them at this stage - are not directly visible to astronomers. Instead their presence is detected by the fact that as they pass between us and their star the light from that star seems to dim, and also because gravitational forces can cause tiny movements in the star itself.

the astronomers were observing one such exoplanet - Kepler 1625-b - and noticed what they call deviations and wobbles. They believe that this behaviour can only be explained by the presence of a very large (Neptune-sized) moon.

This is the Guardian story: https://www.theguardian.com/science/2018/oct/03/astronomers-discover-first-suspected-exomoon-8000-light-years-away?CMP=share_btn_tw

the original article is here: https://www.theguardian.com/science/2018/oct/03/astronomers-discover-first-suspected-exomoon-8000-light-years-away?CMP=share_btn_tw

and the ESA has a good page on how this search is carried out here: https://www.theguardian.com/science/2018/oct/03/astronomers-discover-first-suspected-exomoon-8000-light-years-away?CMP=share_btn_tw


Recent Posts

See All

I was one of the 75 teachers who logged in last night, courtesy of the IoP + ISTA to hear Raghnall Quinn generously give up his time to share his insights into the marking schemes for this year’s pap

As has happened for a number of years, the IoP and The ISTA are joining foces next Tuesday to organise a session where Raghnall Quinn, an experienced marker of Leaving Certificate Physics papers, will