Sunday, June 1, 2025

Polaris of Enlightenment

Planetary alignment – six planets to appear together in night sky

Published 20 January 2025
– By Editorial Staff

By the end of January, several planets will be visible from Earth and at least four will be visible to the naked eye, without the aid of telescopes.

The phenomenon, known colloquially as planetary alignment, occurs when several of the solar system’s planets are visible simultaneously in the night sky, usually close to the ecliptic – the path the Sun follows across the sky. The term “planetary alignment” can be misleading because the planets do not line up perfectly, either in the sky or in the solar system as a whole.

The planets become visible because they are on roughly the same side of the Sun and are therefore well-positioned relative to the Earth, allowing them to be seen in the night sky. These events are relatively rare and vary in magnitude depending on the number of visible planets and their brightness.

In January, Mars, Jupiter, Uranus, Venus, Neptune and Saturn will be visible in the night sky, CNET reports. They are estimated to become visible a few days before January 21 and remain visible for about four weeks. The fifth week of the year, during the new moon, is expected to be the best time for observation because of the darker skies.

Seen with the naked eye

Provided there is no interference from artificial light where you are, the planets may become visible as soon as the Sun sets. Venus, Mars, Jupiter and Saturn can be seen with the naked eye from northern Europe, according to Astroinfo. Jupiter and Venus are the easiest to observe, while Saturn can be difficult to spot in poorer visibility conditions. To see Neptune and Uranus, however, a telescope is required, as well as good visibility conditions.

If you want a chance to see all six planets, head out early in the evening, as Venus and Saturn will soon dip below the horizon. However, Mars and Jupiter will be visible for most of the night.

In the first week of March, Mercury will also become visible, which means a new planetary parade with all the planets in the solar system except Earth. March 8 is predicted to be a good day to see Mercury. The planet will be difficult to see, but the best chance is in the southern parts of Sweden. If you are going out with a telescope at this time, you should be careful as some of the planets will be close to the Sun, and as it can damage your eyes, you should be careful where you point the telescope.

However, this planetary parade is short-lived, as Saturn, Neptune and Mercury will be too close to the Sun shortly afterwards and will no longer be visible.

Finding the planets

Locating the planets in the sky can be challenging. Venus and Saturn are low in the southwest, while Jupiter is high in the east-southeast, according to Astrokonsult. Mars is in the east-northeast, Uranus in the constellation Aries and Neptune in Aquarius. Mercury can be seen low above the horizon in the south-east. Tools such as the Stellarium and Star Walk 2 apps can help you navigate the night sky.

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Swedes earn money clearing invasive species

Biodiversity

Published 28 May 2025
– By Editorial Staff
Large-leaved lupines are beautiful - but highly invasive.

Through a mobile game, individuals can “play” by heading out into nature, removing invasive plants, and even getting paid for their efforts. This year, seven Swedish municipalities are testing the game.

The Crowdsorsa mobile game has been used in Finland for three consecutive years, where last year it removed invasive plants from 7000 observations. It is also available in Canada.

This year, the municipalities of Hagfors, Örebro, Sunne, Karlsborg, Lilla Edet, Tanum and Falun are trying it out. The idea is that individuals find invasive plants, either via the map in the app or by themselves, remove them and get paid. As proof, they must film before and after clearing.

The total budget for this year in Sweden is SEK 126,000 (€11,600), which individuals can “play” for. At most, you can earn SEK 200 (€18.5) per hour, with the municipality responsible for paying out the reward.

“Fun way to work”

Last year, it was also successfully used in Hagfors and Örebro. In Hagfors, a total of 17 different teams played.

– The players did a great job! We think it’s a fun way to work with invasive alien species and an effective way to reach the public – and especially young people – with knowledge about invasive species, says municipal ecologist Katarina Karlsson in Hagfors municipality to Natursidan.

Invasive species often spread quickly and can displace native species, which in turn can damage the ecosystem. The game starts already in June, where, among other things, large-leaved lupine, Himalayan balsam and Canadian goldenrod will be removed.

Lion population growing in India

Published 25 May 2025
– By Editorial Staff
An Asiatic lion cub waiting for food.

Asian lions have seen a strong resurgence in India in recent years. A new count shows that the population has increased by over 30 percent in just five years.

The number of Asian lions in the state of Gujarat in western India has risen from 674 individuals in 2020 to 891, according to the latest official count (May 10–13, 2025), reports The Independent. This represents an increase of 32 percent.

The lions live mainly in and around Gir National Park – the only area in the world where this subspecies of lion exists in the wild.

The new figure was recently announced by Gujarat Chief Minister Bhupendra Patel.

The number of lions in the state has gradually increased not just because of favorable geography and climate, but due to our government’s consistent and careful approach to wildlife conservation, said Patel.

Growing population

Over the past decade, the population has grown steadily, and lions have now spread to eleven districts in the Saurashtra region of Gujarat, where they can be observed in forests, grasslands, agricultural areas, and even coastal areas.

Of the 891 individuals, 196 are adult males, 330 are adult females, 140 are young adults (sub-adults), and 225 are cubs, according to state government figures.

Gujarat attributes the success to several efforts: regular monitoring, enhanced veterinary care, water and feed resources in the wild, and programs to reduce conflicts between humans and predators.

Drones, sensors, and camera traps are also used in an extensive monitoring network.

Vulnerability remains

Despite the increase, however, the lions remain vulnerable. The species is classified as vulnerable on the international red list, and threats include genetic inbreeding, diseases that can spread rapidly in the densely concentrated population, and fires and floods in the Gir Forest.

Sanjeev Kumar, Chief Secretary for Forest and Environment in Gujarat, explains.

The holding capacity of national park and sanctuaries will be increased by intervention and habitat improvement. There is still scope of increasing the holding capacity and the forest and environment department is working in that direction.

Gujarat has previously opposed proposals to transplant parts of the population to other parts of India, including the state of Madhya Pradesh, which has led to debate within the country’s environmental movement.

Asian lions (Panthera leo persica) are genetically and physically distinct from their African relatives. They are slightly smaller in size, have shorter manes in males, and live in smaller prides.

FACTS: Gir National Park

  • Location: Located in the state of Gujarat, western India
  • Established: 1965 (as a national park; the reserve was established earlier, in 1913)
  • Area: Approximately 1,412 square kilometers (including the national park and adjacent wildlife sanctuary)
  • Purpose: To preserve the last wild population of Asiatic lions (Panthera leo persica)
  • Ecosystem: Dry deciduous forest, savannah, and scrub forest with semi-desert elements
  • Animal species: In addition to Asiatic lions, there are leopards, spotted hyenas, Indian crocodiles (mugger crocodiles), axis deer (chital), sambar deer, and over 300 bird species
  • Threats: Forest fires, drought, genetic inbreeding, disease, and human impact such as habitat loss and conflicts with humans

Antarctic ice levels show recent growth

Published 25 May 2025
– By Editorial Staff
Between 2021 and 2023, the ice mass increased by an average of 108 gigatonnes per year - likely due to increased precipitation.

Antarctica has long been associated with melting ice – but between 2021 and 2023, new research shows unexpected growth.

Using NASA satellite data, researchers from Tongji University in China measured Antarctic ice masses between 2002 and 2023, focusing mainly on four East Antarctic glacier areas – Denman, Moscow, Totten and Vincennes Bay – located in the Wilkes Land-Queen Mary Land area.

Over the period 2002-2010, the ice mass in Antarctica decreased by an average of 74 gigatons per year, the results, presented in Science China Earth Sciences, show. Furthermore, the ice mass decreased further between 2011 and 2020, with the loss reaching 142 gigatons per year. This has contributed to a sharp rise in sea levels.

Despite the significant decrease, the trend reversed dramatically between 2021 and 2023, when the ice mass increased by an average of 108 gigatonnes per year. The main reason is believed to be that the area had high precipitation compared to previous years. This has contributed to an average increase in sea levels of 0.3 millimeters per year.

The researchers emphasize that the increase may be a temporary trend and does not necessarily mean that ice masses will continue to increase.

Chemicals in electronic waste may damage cells

Published 24 May 2025
– By Editorial Staff

Electronic waste contains carcinogens, according to research from Örebro University and others. The chemicals in the waste can cause hormone disruption and inflammation in human cells.

There is still limited research on how plastics and other materials in waste affect health and the environment. Researchers at Linköping University, Örebro University and the RISE research institute have investigated how chemicals from plastic in electronic waste affect human cells. They used the technique of “cell painting”, where different parts of cells were stained with fluorescent markers.

Using advanced microscopy, we can take thousands of images of a cell and compare it to a cell exposed to chemicals from e-waste. We also perform image analysis using CellProfiler software, which detects cellular changes that are too subtle for the human eye, says Andi Alijagic in a press release.

The study, published in Environmental Research, shows that electronic waste contains a mix of hazardous chemicals. The researchers found polyaromatic hydrocarbons (PAHs), organophosphates and phthalates – substances that are already known to have harmful effects on health. PAHs contain carcinogens, for example.

Exposure to these chemicals was found to cause inflammatory reactions in cells, a process that often underlies various diseases. The researchers also noted that the chemicals affected hormone signaling, which can have negative effects on reproductive health in both women and men.

The researchers emphasize that the chemicals must be managed during recycling to prevent their release into the environment.

We throw away huge amounts of electronics every day, and the chemicals could affect human health if they end up in soil and water, says Alijagic.

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