For example, NASA's Kepler space observatory has found several planetary systems orbiting double stars
Nine bright southern double stars
were measured and compared with observations made by Bob Argyle (from Cambridge University) using the 26" refractor in Johannesburg and the values listed in the Washington Double Star
Dubai Astronomy Group's event, he said, will also provide visitors an opportunity to look through the club telescopes at other celestial objects including Saturn, Mars, double stars
, globular clusters, nebula and other deep sky objects, in addition to moonrise just before sunrise, in close conjunction with the planet Venus.
Visual double stars
are among the easiest of all astronomical objects to observe.
The new study shows that to properly interpret the Universe, this simplification cannot be made: these heavyweight double stars
are not just common, their lives are fundamentally different from those of single stars.
The International Occultation Timing Association (IOTA) undertakes a worldwide programme of video-recording lunar occultations of known and suspected double stars
, to ascertain their duplicity, position angle, separation and difference in magnitude.
Although there have been past hints of the existence of other planets around double stars
, this is the first confirmation.
It is the first time scientists have confirmed the existence of a planet circling double stars
The new star joins the company's existing Christmas portfolio which includes White on White Double Stars
and Chocolate Holly Leaves with attractive red chocolate berries.
Herschel was also an accomplished telescope builder, and spent much of his time observing the sky looking for double stars
Topics addressed by the papers include planetary masses and orbital parameters from radial velocity measurements, terrestrial planets in extrasolar planetary systems, mission requirements in the search for extrasolar planets, possible detection of biomarkers indicating the presence of life on extrasolar planets, the formation of resonant planetary systems, impact of stellar activity on the evolution of planetary atmospheres and habitability, dynamics of the extrasolar planetary, planets in double stars
, the transit method of extrasolar planet detection and analysis, US programs and space missions for extrasolar planet research, and habitable zones in extrasolar planetary systems.
144 double stars
are listed and mapped in order to provide useful tagets for those nights when deep-sky observation is less than optimum.