To help you learn about the southern night sky, Sydney Observatory provides a guide and a sky map or chart each month. This month's guide is presented by Melissa Hulbert, Sydney Observatory’s Astronomy Programs Coordinator.
November has a spectacular treat in store for all of you early-birds! During late October, Venus has been dancing in the pre-dawn sky with Jupiter and Mars. This dance continues in early November, with Venus and Mars at their closest on November 3 and 4, after which Venus slowly starts to retreat towards the east horizon.
Regular solar observer & correspondent Harry Roberts reports on active region AR12422, a complex Delta Group: AR12422: Complex Delta Group. Harry Roberts Hale’s invention of the visual magnetograph and the Hale Classification of sunspots is a heroic tale, but we can only touch on it here.
What is the closest star, in the night-time sky, to Earth? Almost everyone answers Alpha Centauri, the brighter of the pair of Pointer stars. But Alpha Centauri is in fact a system of three stars.
This Friday, October 9, at dawn the Moon will move in front of Venus and hide, or occult, it. These occultations of Venus are visible from Earth once or twice per year, yet from any one location, such as Sydney, it can be about 5 to 10 years between occurrences.
Orionids meteor shower expected to peak on 21 October To help you learn about the southern night sky, Sydney Observatory provides a written guide and a sky map or chart each month. This month's guide is presented by Dr Andrew Jacob (pictured, right), Curator of Astronomy at Sydney Observatory.
As Comet 67P/Churyumov-Gerasimenko reaches its closest point to the Sun, perihelion, on August 13, its activity is increasing. This short lived jet was spotted by the narrow angle camera on board ESA's Rosetta spacecraft.
To help you learn about the southern night sky, Sydney Observatory provides a guide and a sky map or chart each month. This month's guide is presented by Melissa Hulbert, Sydney Observatory Astronomy Programs Coordinator.
Warwick Holmes worked for over four years at the European Space Agency (ESA) on the Rosetta/Philae mission to comet 67P/Churyumov–Gerasimenko. He recently visited Sydney Observatory and brought along his model of the comet.
Coffee/tea and astronomers have long had a symbiotic relationship - there is nothing like a good cuppa at 2am with still a few more hours of observing to go! With that in mind, this Sunday (26th July) is The Rocks Aroma Festival of which Sydney Observatory is a part.
This weekend, 18 & 19 July 2015, the crescent Moon, Venus and Jupiter make a nice grouping in the western sky in the evening twilight. The Moon may be first visible on Friday night as a thin crescent below both Venus and Jupiter.
And finally it's July 14 2015. The New Horizons Pluto fly-by happens today! After we receive its last approach image at about 5:30pm* AEST New Horizons turns towards Pluto and will be out of touch for many hours.
AR12371: Delta Groups and Flares of Solar Cycle 24. Sketch and copyright Harry Roberts ©, all rights reserved. Regular solar observer & correspondent Harry Roberts reports on his observations of flares seen on June 20-21 (UT).
Deirdre Kelleghan is a regular contributor to this blog. Recently she sent us this lovely sketch of the Sun. Most astronomical objects have a more or less static appearance. Our Moon shows regular changes in shape and the planets moons' change position.
In my previous post about Pluto I included three maps, not images, released in 2010 and laboriously made by a team led by Marc Buie of the Southwest Research Institute, Colorado. Fortuitously, the latest New Horizons image also shows three views of Pluto.