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2021-01-14 21:50:10 hi Open / Comment

2020-11-14 03:41:40 ​​Venus is the hottest planet in the solar system and has an average surface temperature of around 450° C.

Interestingly, Venus is not the closest planet to the Sun – Mercury is closer but because Mercury has no atmosphere to regulate temperature it has a very large temperature fluctuation. Open / Comment

2020-11-12 07:27:37 ​​It might sound crazy that black holes could spawn new universes – especially since we're not sure other universes exist – but the theory behind this is an active field of research today.

A very simplified version of how this works is that our Universe today, when you look at the numbers, has some extremely convenient conditions that came together to create life. If you tweaked these conditions by even a miniscule amount, then we wouldn't be here.

The singularity at the centre of black holes breaks down our standard laws of physics and could, in theory, change these conditions and spawn a new, slightly altered universe. Open / Comment

2020-11-05 22:45:58 ​​The Moon (or Luna) is the Earth’s only natural satellite and was formed 4.6 billion years ago around some 30–50 million years after the formation of the solar system. The Moon is in synchronous rotation with Earth meaning the same side is always facing the Earth. The first uncrewed mission to the Moon was in 1959 by the Soviet Lunar Program with the first crewed landing being Apollo 11 in 1969. Open / Comment

2020-10-23 17:24:11 ​​Over 700 galaxies appear in this image of the Virgo Cluster, including the string of galaxies known as Markarian’s Chain at the center of the field. The Virgo Cluster, which sits 65 million light-years away, is near the center of our Local Supercluster; their coincident positions are why it is called the Virgo Supercluster. Open / Comment

2020-10-23 17:16:51 ​​The Milky Way Galaxy is our home galaxy in the universe. It is a fairly typical barred spiral with four major arms in its disk, at least one spur, and a newly discovered outer arm. The galactic centre, which is located about 26,000 light-years from Earth, contains at least one supermassive black hole (called Sagittarius A*), and is crossed by a bar. The Milky Way began forming around 12 billion years ago and is part of a group of about 50 galaxies called the Local Group. The Andromeda Galaxy is part of this group as are numerous smaller galaxies, including the Magellanic Clouds. The Local Group itself is part of a larger gathering of galaxies called the Virgo Supercluster of galaxies. Open / Comment

2020-10-03 21:27:37 ​​This stunning image by the NASA/ESA Hubble Space Telescope features the spiral galaxy NGC 5643 in the constellation of Lupus (the Wolf). NGC 5643 is about 60 million light-years away from Earth. Open / Comment

2020-09-15 06:12:53 Today, the Royal Astronomical Society made a groundbreaking announcement. Scientists from a number of universities around the world using ground based telescopes determined the presence of phosphine (PH3) in Venus' upper atmosphere.
Phosphine takes an incredible amount of energy to produce. From our understanding, the only sources of phosphine on terrestrial worlds like Earth are from organisms. On Earth, phosphine is produced by anaerobic organisms like penguins. On gas giants like Jupiter and Saturn, they have the energy to produce phosphine, but Earth does not and from our understanding of Venus now, it shouldn’t have the energy to do so either.
The surface of Venus is an inhospitable hellhole, with temperatures of 425°C (800°F) or more and pressure 90x that at Earth's sea level. It's very unlikely for an organism to survive on its surface. Along with that, its atmosphere is toxic, containing sulfuric acid.
The presence of phosphine was found at about ~50km (32mi) at about 20°C (68°F), a very temperate climate on Venus. This region has been a concept for a “city” on Venus due to its hospitable environment. Despite that, its atmosphere is still toxic with sulfuric acid.
The clouds on Venus are not like Earth’s though, they are global encompassing and can last for thousands of years. In contrast, our own planet has cloud formations that last hours and are just a few kilometers in length. Despite that, in remote places on Earth, we have found the presence of organisms in cloud formations 35km (22mi) off the ground.
The presence of phosphine does not mean that life is there. There are a number of scenarios that it could be. It could be from chemical or geologic processes that are happening on the planet that we yet don't understand. This follows the trend of what we know about Venus: it's a ball of mystery under those clouds, there is much we yet don't know about it's clouds and what happens underneath them. In sum, what this means is that we found a gas that is typically a biosignature on terrestrial planets, and we yet can’t explain where it came from. Open / Comment

2020-09-14 21:41:05 SPACE pinned «@FirstSpaceChat » Open / Comment

2020-09-14 03:06:48 @FirstSpaceChat
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