Home / Science / How long is the longest day of the solar system? Venus has the answer.

How long is the longest day of the solar system? Venus has the answer.



By Will Dunham

WASHINGTON (Reuters) – Data obtained from radio bounces from Venus – treating it, as one scientist said, like a giant disco ball – is providing new insights into its closest planetary neighbors. Most of the world includes accurate calculation of the length of Venus days.

The study also measured the inclination of the Venus axis and the size of the planet’s core, giving a deeper understanding of the so-called mystery Earth. The ‘evil twins’ of the world

It is well known that Venus has the longest day – the time it takes for the planet to spin around its axis only once ̵

1; of any planet in our solar system, although there have been discrepancies from previous estimates.

Studies have shown that a single rotation around Venus takes 243.0226 Earth days, meaning that one day will be longer than a year on Venus, completing its orbit around the sun in 225 Earth days.

The researchers sent radio waves to Venus 21 times from 2006 to 2020 from NASA’s Goldstone antennas in the Mojave Desert, California, and studied radio resonance, which provides information on the characteristics of certain planets at Goldstone. And at the Greenbank Observatory in West Virginia

“Each measurement is derived from treating Venus as a giant disco ball. We light Venus with a giant flashlight, radar at Goldstone, and observe its reflections as they sweep across the Earth’s surface,” said Jean. – said UCLA professor of planetary astronomy, Luc Margot, who led the study published in the journal Nature Astronomy.

“Venus is an incredible laboratory for understanding planetary formation and evolution, and just a few steps away, there are billions of Venus-like planets in the galaxy,” Margot added.

New data show that the planet Venusian core is approximately 4,360 miles (7,000 km) in diameter, comparable to that of the Earth’s core. Previous major estimates of Venus were based on computer modeling rather than observational data.

Its core is almost always composed of iron and nickel, although it’s not clear if it’s solid or molten, Margot said.

Venus rotates on an almost vertical axis, meaning there are no visible seasons while the Earth is more tilted. The study calculated Venus’s tilt at approximately 2.64 degrees Earth at approximately 23.5 degrees.

Venus, the second planet from the Sun, has a similar structure. But slightly smaller than Earth, about 7,500 miles (12,000 km) in diameter, above the projected landscape is a thick and toxic atmosphere primarily composed of carbon dioxide, with aerosols of sulfuric acid. With the inevitable greenhouse effect, its surface temperature reached 880 degrees Fahrenheit (471 degrees Celsius), hot enough to melt lead.

Venus rotates from east to west, which is the opposite direction to the rest of the planets in our solar system except Uranus. On the other hand, its day-night cycle – the time between the sun rises relative to the length of its uniaxial rotation – spends 117 days on Earth as Venus rotates in the opposite direction of its orbiting path.

Venus receives less scientific attention than Mars, its neighbor to Earth’s other planets and other solar system destinations.

“I don’t think Venus is more difficult to understand than other planets if we have enough data. But there is an unfortunate lack of information about Venus, ”Margot said.

“There were no NASA missions to Venus in nearly 30 years, and about a dozen NASA missions to Mars during this time,” said Margot, adding that new discoveries about Venus’ rotation could help in making it possible. How does it land in the future?

(Reporting by Will Dunham, editing by Rosalba O’Brien)


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