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The depiction of the climate crisis as a cliff—once we fall off the edge, it’s game over—is nonsense

To make the most of any total solar eclipse, put down your gadgets and bask in one of our solar system’s most glorious spectacles

Diving at One Tree Island in one of the most highly protected parts of the Great Barrier Reef reveals the shocking extent of the latest mass bleaching event

Diving at One Tree Island in one of the most highly protected parts of the Great Barrier Reef reveals the shocking extent of the latest mass bleaching event

All you need to know about how to observe our local star, the sun, safely.

Can cultivating positive behaviours and tweaking our lifestyles lead to healthier, happier lives – even longer lives? Discover the daily choices that may make the difference in a fascinating new book

Can cultivating positive behaviours and tweaking our lifestyles lead to healthier, happier lives – even longer lives? Discover the daily choices that may make the difference in a fascinating new book

In 1973 Concorde broke the record for the longest total solar eclipse in history by extending totality to 74 minutes.

Total solar eclipses have set the stage for major scientific advancements—everything from the discovery of helium to the testing of Einstein’s general theory of relativity.

Launched on 21 February 2024 on Apple TV+, new original series Constellation has gripped viewers with its mix of sci-fi and mind-bending mystery.

Venus and Jupiter may shine through the blue sky during the April 8th solar eclipse even if the eclipse for you is only deep partial. After dark, Orion walks down in the southwest.

The post This Week's Sky at a Glance, April 5 – 14 appeared first on Sky & Telescope.

North America will have a total solar eclipse on 8 April – here is where, when and how to view it safely

North America will have a total solar eclipse on 8 April – here is where, when and how to view it safely

Image: This Copernicus Sentinel-2 image features part of Victoria, a state in southeast Australia.

Video: 00:29:37

Pablo Álvarez Fernández, one of ESA's five astronaut candidates currently undergoing basic astronaut training at the European Astronaut Centre in Cologne, Germany, shares his experiences in astronaut training, his favourite lessons, and his view on the future of space exploration. Also, stay tuned to hear his favourite space-related quote and movie!

This is Episode 5 of our ESA Explores podcast series introducing the ESA astronaut class of 2022, recorded in November 2023.

Music and audio editing by Denzel Lorge. Cover art by Gaël Nadaud.

Access all ESA Explores podcasts.

 

For the first time, potential signs of the rainbow-like ‘glory effect’ have been detected on a planet outside our Solar System. Glory are colourful concentric rings of light that occur only under peculiar conditions.

 

Data from ESA’s sensitive Characterising ExOplanet Satellite, Cheops, along with several other ESA and NASA missions, suggest this delicate phenomenon is beaming straight at Earth from the hellish atmosphere of ultra-hot gas giant WASP-76b, 637 light-years away.

 

Seen often on Earth, the effect has only been found once on another planet, Venus. If confirmed, this first extrasolar glory will reveal more about the nature of this puzzling exoplanet, with exciting lessons for how to better understand strange, distant worlds. 

2 min read

Hubble Peers at Pair of Closely Interacting Galaxies This NASA/ESA Hubble Space Telescope image features Arp 72.ESA/Hubble & NASA, L. Galbany, J. Dalcanton, Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA

This image from the NASA/ESA Hubble Space Telescope features Arp 72, a very selective galaxy group that only includes two galaxies interacting due to gravity: NGC 5996 (the large spiral galaxy) and NGC 5994 (its smaller companion, in the lower left of the image). Both galaxies lie approximately 160 million light-years from Earth, and their cores are separated from each other by a distance of about 67,000 light-years. The distance between the galaxies at their closest points is even smaller, closer to 40,000 light-years. While this might sound vast, in galactic separation terms it is really quite close. For comparison, the distance between the Milky Way and its nearest independent galactic neighbor Andromeda is around 2.5 million light-years. Alternatively, the distance between the Milky Way and its largest and brightest satellite galaxy, the Large Magellanic Cloud (satellite galaxies orbit around another galaxy), is about 162,000 light-years.

Given this and the fact that NGC 5996 is roughly comparable in size to the Milky Way, it is not surprising that NGC 5996 and NGC 5994 — separated by only about 40,000 light-years — are interacting with one another. In fact, the interaction likely distorted NGC 5996’s spiral shape. It also prompted the formation of the very long and faint tail of stars and gas curving away from NGC 5996, up to the top right of the image. This ‘tidal tail’ is a common phenomenon that appears when galaxies closely interact and is visible in other Hubble images of interacting galaxies.

Text credit: European Space Agency (ESA)

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Media Contact:

Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, MD
claire.andreoli@nasa.gov

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Details Last Updated Apr 05, 2024 EditorAndrea Gianopoulos Related Terms

• Astrophysics
• Astrophysics Division
• Galaxies
• Goddard Space Flight Center
• Hubble Space Telescope
• Missions
• The Universe

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A SpaceX Falcon 9 rocket is set launch 23 of the company's Starlink broadband satellites early this morning (April 5).

Travelling to Mars has its own challenges. The distance alone makes the journey something of a mission in itself. Arrive though, and the handwork has only just begun. Living and surviving on Mars will be perhaps humans biggest challenge yet.  It would be impossible to take everything along with you to survive so instead, it would be imperative to ‘live off the land’ and produce as much locally as possible. A new rover called AgroMars will be equipped with a number of agriculture related experiments to study the make up of the soil to assess its suitability for growing food. 

Growing food on Mars poses a number of challenges, chiefly due to the harsh environmental conditions. Not least of which is the low atmospheric pressure, temperature extremes and high radiation levels. To try and address these, new techniques have been developed in the fields of hydroponics and aeroponics. The key to these new techniques involves using nutrient rich solutions instead of soils. 

Special structures are build analogous to greenhouses on Earth with artificial lighting, temperature and humidity control. Genetic engineering too has played a part in developing plants that are more hardy and capably of surviving in harsh Martian environments. As we continue to explore the Solar System and in particular Mars, we are going to have to find ways to grow food in alien environments. 

The space station’s Veggie Facility, tended here by NASA astronaut Scott Tingle, during the VEG-03 plant growth investigation, which cultivated Extra Dwarf Pak Choi, Red Russian Kale, Wasabi mustard, and Red Lettuce and harvested on-orbit samples for testing back on Earth. Credits: NASA

Enter AgroMars. A space mission taking a rover to Mars to hunt for, and explore the possibility of establishing agriculture on Mars! The rover will be launched with similar capabilities to the likes of Perseverance or Curiosity. The rover will be launched to Mars by a Falcon 9 launch vehicle operated by Space X but this is some years off yet. The development phase has yet to start. In a paper by lead author M. Duarte dos San- tos the mission has been shaped, reality is a little way off. 

On arrival, AgroMars will use an X-ray and infrared spectrometer, high resolution cameras, pH sensors, mass spectrometers and drilling tools to collect and analyse soil samples. The samples will be assessed for mineralogical composition, soil texture, soil pH, presence of organic compounds and water retention capacity. 

To be able to assess the Martian soil the rover must possess advanced capabilities for collecting and analysing soil samples, more than before. The data will then be sent on to laboratories on Earth and it is their responsibility to interpret the information. The multitude of groups involved is a wonderful reminder how science transcends geographical borders. Working together will yield far better results and help to advance our knowledge of astrobiology and agriculture on Mars. 

‘Calypso’ Panorama of Spirit’s View from ‘Troy’. This full-circle view from the panoramic camera (Pancam) on NASA’s Mars Exploration Rover Spirit shows the terrain surrounding the location called “Troy,” where Spirit became embedded in soft soil during the spring of 2009. The hundreds of images combined into this view were taken beginning on the 1,906th Martian day (or sol) of Spirit’s mission on Mars (May 14, 2009) and ending on Sol 1943 (June 20, 2009). Credit: NASA/JPL-Caltech/Cornell University

This doesn’t come cheap though. The estimated cost of the mission is in the region of $2.7 billion which includes development, launch and exploration for the entire mission. 

The total cost of the mission is estimated to be around $2.7 billion, which includes $2.2 billion for the development and launch of the rover and $500 million for its exploitation during the entirety of the mission. Whether it – pardon the pun – gets off the ground is yet to be seen but if we are to explore and even establish a permanent base on Mars then we will have to gain a better understanding of the environment to feed and sustain future explorers. 

Source : AgroMars, Space Mission Concept Study To Explore Martian Soil And Atmosphere To Search For Possibility Of Agriculture on Mars.

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The post Want to Start a Farm on Mars? This Rover Will Find Out if it’s Possible appeared first on Universe Today.

To remain youthful in a cosmic demolition derby around supermassive black hole Sagittarius A*, some cannibalistic stars gruesomely bathe in outer layers of their stellar victims.