Lifeboat Foundation

An expert warned that Earth might experience a mini ice age when the Sun hibernates due to its solar minimum cycle. According to the expert, the Sun’s hibernation and extremely cold weather could last for over three decades.

The solar minimum is a period in the Sun’s solar cycle that occurs every 11 years. During the solar minimum, sunspots on the Sun’s surface diminishes, leading to a weaker output from the massive star. On the other hand, during a solar maximum, the Sun emits more energy as its sunspots increase.

According to Valentina Zharkhova, a professor at Northumbria University’s department of mathematics, physics and electrical engineering, the Sun is about to enter a Grand Solar Minimum this year, which is like an extended version of the solar minimum. Instead of lasting for only a couple of years, the Grand Solar Minimum could extend for 33 years.

Scientists and amateur collectors unite to reconstruct vanished ice age landscape inhabited by Neanderthals, other ancient humans.

Buildings with this concrete can—in regions with a calm mediterranean climate—absorb CO2 and release oxygen with micro-algae and the other “pigmented microorganisms” that coat it. These vertical gardens boast aesthetic appeal, but the biological concrete’s beauty also lies in its clever design.

The concrete works in layers. The top layer absorbs and stores rainwater and grows the microorganisms underneath. A final layer of the concrete repels water to keep the internal structure safe. The top can also absorb solar radiation, which insulates the building and regulates temperatures for the people inside.

A team of researchers – including the Max Planck Institute for Extraterrestrial Physics in Garching – have gained astounding insights into the galactic centre: The astronomers have spotted gaseous clouds which are spinning around the assumed black hole at the heart of the Milky Way at a speed of around 30 percent of the speed of light. The gas is moving in a circular orbit outside the innermost stable path and can be identified through radiation bursts in the infrared range. This discovery was made possible by the Gravity Instrument, which combines the light of all four eight-metre mirrors of the Very Large Telescope at the European Southern Observatory (ESO). Thanks to this technology, which is called interferometry, Gravity generates the power of a virtual telescope with an effective diameter of 130 metres.

This unusually compact object sits right in the middle of the Milky Way and generates radio emissions: Astronomers call it Sagittarius A*. It is highly probable that this is a black hole with the mass of approx. four million suns. But this is by no means certain, and scientists are always devising new tests to support this thesis. Researchers have now used the Gravity Instrument to take a close look at the edges of the alleged black hole.

According to this theory, the electrons in the gas approaching the event horizon should speed up and therefore increase in brightness. The region of only a few light hours around the black hole is very chaotic, in a similar way to thunderstorms on Earth or radiation bursts on the Sun. Magnetic fields also play a part here, because the gas conducts electricity making it a plasma. The latter should ultimately show up as a flickering “hot spot” circling the black hole on the final stable path.

Holly Jean Buck is a fellow at UCLA’s Institute of the Environment and Sustainability. This is an adapted excerpt from her upcoming book After Geoengineering: Climate Tragedy, Repair, and Restoration (September 2019, Verso Books).

Real Mars research at the end of the world.

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Via NowThis Politics