Showing posts with label astronomy. Show all posts
Showing posts with label astronomy. Show all posts

Friday, 13 December 2024

NIGHT SKY, JUST NOW

Looking out of my bedroom window, with the Moon Jupiter Orion and Sirius taking pride of place. I have included a screenshot from the excellent app Stellarium that is a must have for all stargazers as it can help identify all those heavenly bodies up there in real time. If you are interested in all things space, star, planet, exoplanet, SETI and extraterrestrial life, follow my account on Instagram: @nicvard

This post is part of the Skywatch Friday meme



Monday, 13 June 2022

SUPERMOON

The full moon overnight of June 13-14 is a supermoon. A supermoon is a new or full moon at its closest to Earth for the month. Does it look bigger than usual? No. But are supermoon full moons brighter than ordinary full moons? Yes!

This post is part of the Mosaic Monday meme,
and also part of the Blue Monday meme,
and also part of the Seasons meme.


Sunday, 12 December 2021

EVENING STAR

Venus, also known as the Evening Star or the Morning Star, depending on its position in the sky and its relationship to setting or rising sun. As one of the brightest objects in the sky, Venus has been a major fixture in human culture for as long as records have existed. It has been made sacred to gods of many cultures, and has been a prime inspiration for writers and poets. Venus was the first planet to have its motions plotted across the sky, as early as the second millennium BC, and was a prime target for early interplanetary exploration as the closest planet to Earth (as much as 261 million kilometres far - that's very far!).

It was the first planet beyond Earth visited by a spacecraft (Mariner 2) in 1962, and the first to be successfully landed on (by Venera 7) in 1970. Venus's thick clouds render observation of its surface impossible in visible light, and the first detailed maps did not emerge until the arrival of the Magellan orbiter in 1991. Plans have been proposed for rovers or more complex missions, but they are hindered by Venus's extremely hostile surface conditions, exacerbated by a runaway greenhouse gas effect that have raised surface temperatures enough to melt lead metal.

This post is part of the My Sunday Best meme


Monday, 21 June 2021

WINTER SOLSTICE

Today's Winter Solstice in the Southern Hemisphere, marks the shortest day of the year and the longest night. The opposite is true for the Northern Hemisphere, where the Summer Solstice marks the longest day and the shortest night. The southern seasons are explained in the diagram below.

In Melbourne the sun rose at 7:35 am and set at 5:08 pm today. Solstice sunset photo below with a mosaic of some of my "astronomical" art pieces (see more on Instagram @jammysevenk).

This post is part of the Mosaic Monday meme,
and also part of the Blue Monday meme,
and also part of the Seasons meme.



Monday, 28 December 2020

2020 IN REVIEW

2020 was a year full of unfortunate events, disasters and world-changing events that affected almost every person around the world. Here in Australia we were no exception. We suffered devastating bushfires that ravaged much of the east coast of our country in January. On the first of March, Australia recorded its first death due to COVID-19. As March progressed and COVID-19 cases increased, more and more restrictions were introduced nationwide and the financial and economic effects of these became more and more apparent.

As of 6 April 2020 at least 12 deaths and more than 700 cases of coronavirus in Australia occur and are linked to the cruise ship Ruby Princess, which disembarked passengers in Sydney despite several of them, and some crew, showing symptoms of coronavirus. Much of the country enters into lockdown measures in an attempt to stop the spread of COVID-19.

In early July, as a response to the COVID-19 pandemic, Melbourne and nearby Shire of Mitchell reintroduce stage three restrictions for at least six weeks after a surge in coronavirus case numbers with the majority of new cases stemming from community transmission. All other states and territories introduce strict quarantine measures or deny entry for any incoming travellers who have recently visited Victoria. The border between New South Wales and Victoria is closed for the first time since the 1918–19 Spanish flu pandemic, after an increase in COVID-19 cases in Melbourne.

Due to the COVID-19 pandemic and escalating numbers of infection rates, especially in the workplace, Victoria declares a state of disaster and stage four restrictions are put in place on 2 August . This included a police-enforced curfew in metro Melbourne and Mitchell Shire between 8 pm and 5 am, the shutdown of a number of non-essential businesses, exercise only allowed for one hour a day and only one person per household allowed to go shopping once a day and within a 5 km radius of home. As a consequence of rising infection numbers imported from metropolitan Melbourne all other areas of regional Victoria are to enter stage three restrictions previously placed on Melbourne and Mitchell Shire on 5 August.

On 2 September the Australian economy went into recession for the first time in nearly thirty years, as the country's GDP fell 7 per cent in the June quarter.

The Australian Defence Force released on 19 November the final report of the inquiry by Justice Paul Brereton into alleged war crimes during the War in Afghanistan. The inquiry found there was credible evidence of 23 incidents of unlawful killings and a further two instances of the war crime of "cruel treatment". The inquiry also found that Australian soldiers summarily executed non-combatants and prisoners.

On 18 December the 2020 Sydney to Hobart yacht race race was cancelled for the first time in its history due to an outbreak of the COVID-19 pandemic in Sydney New South Wales. On 19 December, in response to a coronavirus outbreak in the Northern Beaches area of Sydney, all other states and territories close their borders to all residents of greater Sydney, throwing interstate travel plans into chaos for those intent on visiting or leaving greater Sydney.

On 21 December, the final report from the inquiry into Victoria's botched coronavirus hotel quarantine program which led to a second wave of coronavirus in Victoria and over 800 deaths was released. The report is unable to determine who commissioned the use of private security and criticises the Andrews Government for failing to do "proper analysis" of the plan.

On 21 December, Jupiter and Saturn, the two largest planets of the solar system, appeared in a rare "great conjunction". The two planets' proximity in the sky in 2020 hasn't happened in about 400 years, and it hasn't been visible in the evening sky (when the sunlight doesn't obstruct viewing) in about 800 years.

As the world begins to vaccinate widely against COVID-19 in December, there is mounting hope that 2021 will see the pandemic recede and the world may then begin to go back into some semblance of normality.

This post is part of the Mosaic Monday meme,
and also part of the Blue Monday meme,
and also part of the Seasons meme.



Friday, 25 December 2020

PLANETARY CONJUNCTION

This year, many people have been eagerly awaiting Monday (Dec. 21) to arrive for several reasons: For one, Monday was the last solstice of 2020. This means people in the Northern Hemisphere experienced the first day of winter, and the summer solstice arrived in the Southern Hemisphere. Second, the two largest planets of the solar system appeared in a rare "great conjunction" that same night, capturing the attention of people across the world.

Saturn and Jupiter are hundreds of millions of miles apart. However on Monday they formed a line through space with Earth, which caused the two gas giants to appear very close to one another in the evening sky shortly after sunset. Observatories and skywatching enthusiasts across the world have been keenly watching this conjunction because of its rarity. Saturn and Jupiter meet in Earth's sky about once every 20 years, and some years they appear closer to each other than in other years.

The two planets' proximity in the sky in 2020 hasn't happened in about 400 years, and it hasn't been visible in the evening sky (when the sunlight doesn't obstruct viewing) in about 800 years. So I thought I was quite lucky to observe this in my lifetime, on the night of December 20th, and even luckier to be able to capture a shot of it with my camera. That is the first image. The second is a screen capture from the excellent, free astronomy program "Stellarium" (download here: https://stellarium.en.softonic.com/mac/download ). It gives you a magnified view of thee two planets as well as some of their major moons.

In my photo, you can just make out two of Jupiter's moons, probably Ganymede and Callisto.

This post is part of the Skywatch Friday meme.



Monday, 23 September 2019

VERNAL EQUINOX

The Vernal Equinox in Melbourne, Victoria, Australia was on Monday, 23 September 2019 at 5:50 pm AEST. On the two equinoxes every year the Sun shines directly on the Equator and the length of day and night is nearly equal – but not exactly. The Vernal Equinox marks the moment the Sun crosses the celestial equator – the imaginary line in the sky above the Earth’s equator – from North to South in September (in the Southern Hemisphere), marking the beginning of astronomical Spring.

This post is part of the Mosaic Monday meme,
and also part of the Seasons meme,
and also part of the Blue Monday meme.

Monday, 30 July 2018

BLOOD MOON

Curiosity and awe have greeted a complete lunar eclipse, the longest one of this century and visible in much of the world. The so-called "blood moon," when it turns a deep red, was visible at different times in Australia, Africa, Asia, Europe and South America on Saturday when the Sun, Earth and Moon lined up perfectly, casting Earth's shadow on the Moon.

The total eclipse lasted one hour, 42 minutes and 57 seconds, though a partial eclipse preceded and followed it, meaning the Moon spent a total of three hours and 54 minutes in the Earth's umbral shadow, according to NASA.

Mars is currently traveling closer to Earth than it has since 2003, so some observers might have also seen what looked like an orange-red star, but it was in fact the Red Planet. It is a very unusual coincidence to have a total lunar eclipse and Mars at opposition on the same night. Mars is at its brightest in 15 years.

This post is part of the Mosaic Monday meme,
and also part of the Through my Lens meme,
and also part of the Seasons meme,
and also part of the Our World Tuesday meme,
and also part of the Ruby Tuesday meme.




Friday, 20 February 2015

JUPITER ON DISPLAY

Sky watchers in Melbourne will have noticed a very bright star in the Northern sky at night. That 'star' is in fact the planet Jupiter and it is only days from reaching opposition on Saturday 7 March 2015. Even if you are not familiar with the night sky, Jupiter’s brightness means that it is very easy to find. Jupiter will be the brightest star (-2.6 magnitude) you can see.

The term 'opposition' means that the planet Jupiter will rise as the Sun sets and then set as the Sun rises the following morning. For Jupiter, it coincides with the planets closest approach to the Earth, and means that the next few months are prime time for Jupiter watching. In fact, Jupiter is so large (approximately 1,200 Earth’s by volume) that even a reasonable pair of binoculars will resolve Jupiter as a disc plus show four of its largest ('Galilean') moons.

The Galilean moons are the four moons of Jupiter discovered by Galileo Galilei around January 1610. They are by far the largest of the moons of Jupiter. They are Io, Europa, Ganymede, and Callisto and derive their names from the lovers of Zeus. However, in total there are 67 confirmed moons of Jupiter!

I took these photos from my bedroom window tonight. The first photo shows Jupiter in the upper centre of the image. For the close up of Jupiter I used a 30X optical zoom as well as an additional 30X digital zoom. A little brightness/contrast enhancement in Photoshop and voilà! The labelled image of the sky is from the free astronomy application 'Stellarium'. I have added labels for the Galilean moons in the last image.

This post is part of the Skywatch Friday meme.