Participants can register their interest and contribute to the project on the Ogg says that at present, “we don’t have a baseline measurement” when it comes to light pollution in Australia. The evergreen tree of Winter Solstice is a well-loved symbol of life victoriously denying the darkness and cold of winter. It happens twice yearly, once in each hemisphere (Northern and Southern).

Day to night at Siding Spring Observatory in Coonabarabran, Australia. In Australia, of course, the June date of the Winter Solstice sees a splitting from northern traditions as we honour our own southern hemisphere cycles of nature. The winter solstice for the southern hemisphere is when the northern hemisphere is tilted most directly towards the sun. For that hemisphere, the winter solstice is the day with the shortest period of daylight and longest night of the year, when the Sun is at its lowest daily maximum elevation in the sky. During the solstice, the Australasian Dark Sky Alliance are calling on would-be stargazers to engage in a citizen science project as night falls.The project aims to map and measure the level of light pollution across the country, while at the same time attempting to break a Guinness World Record for “Most users to take an online environmental sustainability lesson in 24 hours”.To take part, people will be asked to step outside and count the number of stars they see in the Southern Cross constellation. December Solstice in Universal Coordinated Time is on Monday, December 21, 2020 at 10:02 UTC. On Sunday, Australians are being asked to look at specific constellations, to understand and map the levels of light pollution in cities and regions. Light pollution can actually be solved immediately by turning off your lights, and those changes can be global,” Ms Ogg said.The study will also look at the effects of COVID-19 lockdowns on heavily light-polluted places like big capital cities with lots of housing developments.“With less activity happening around the COVID-19 lockdowns and quarantine, I’ve certainly noticed that the stars seem to be a bit clearer,” UNSW Astrophysicist Kirsten Banks told AAP.“Wherever you are, you’ll be able to see at least a few hundred stars. Sunday is the winter solstice, which is the shortest day of the year, with the sun rising about 7am and setting around 5pm across the east of the country. Even plants are impacted by how much light pollution there is on the ground.In addition to helping with the mapping project, Ogg recommends that people can easily reduce light pollution by only using light when it’s really needed (“do you really need to light the palm tree up at 3am?”), switching to amber-coloured light globes – which place less stress on the environment because they do not mimic daylight the way bright, white light does – and using blockout blinds.“We have plastics that are going to take hundreds of years to remove from the environment,” says Ogg. Winter solstice is today, June 21 It marks the shortest day of the year in the southern hemisphere, when we receive the least energy from the Sun Australians generally use meteorological seasons, but they are not the only way to chart the year Day to night at Siding Spring Observatory in Coonabarabran, Australia.Winter solstice 2020 in the southern hemisphere is on Sunday 21 June. Notes: All timings are represented in 12-hour notation in local time of Sydney, Australia with DST adjustment (if applicable). Winter solstice 2020: Australia has a chance to break a stargazing record Winter solstice 2020 in the southern hemisphere is on Sunday 21 June. Sunrise, sunset and daylight hours An interesting idiosyncrasy relating to the summer solstice is that it does not feature the day with the earliest sunrise and latest sunset as is commonly expected.

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