Universe And Science

2021-07-15 08:47:38 Did You Know?

One sidereal day (one rotation of the planet on its axis) on Venus is longer than a year. It takes Venus longer to rotate once on its axis than to complete one orbit of the Sun. That's 243 Earth days to rotate once on its axis and only 224.7 Earth days to complete one orbit of the Sun. At the equator, Venus is only rotating at 1.81 m/s. Because Venus rotates incredibly slowly, you could be able to watch the sunset on Venus forever just by walking towards it. This slow rotation of Venus makes it the second most spherical object in the solar system after the sun. ओपन / कमेंट

2021-07-14 05:56:30 ओपन / कमेंट

2021-07-13 04:47:10 Did You Know?

750 light-years away from the solar system, TrES-2b is the darkest planet ever found. It is even darker than coal. It has an albedo of 0.0136, which means that it reflects less than 1% of the light that falls on it. It is a gas giant exoplanet that orbits a G-type star. It is 0.03563 AU from its star. The star's intense light heats TrES-2b to a temperature of more than 980 °C. Reasons for TrES-2b's darkness remain unknown and are an active topic of research.

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2021-07-11 07:07:19 Did You Know?

Since Pluto is so far away from the Sun (at a average distance of 39 AU), the Sun would look much dimmer and smaller that it does from here on Earth. From Pluto, the Sun would look like a very bright star. The Sun on Pluto looks about 1,520 times fainter than it does on Earth or 264 times brighter than the full Moon. Even on Pluto, looking directly at the Sun would probably be painful.

Image Source ओपन / कमेंट

2021-07-10 04:38:03 Happy Birthday, Tesla !!

Nikola Tesla was born on July 10, 1856 during a lightning storm. He was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current electricity supply system.

"Nikola Tesla — the master of lightning" ओपन / कमेंट

2021-07-09 04:42:48 This is the view of a 22 km wide Endeavor crater from the Opportunity rover. By the way, did you know? While only about 120 impact craters have been identified on Earth, scientists estimate that on the surface of Mars, there are more than 43,000 impact craters with diameters greater than 5 km.

NASA/JPL | Source ओपन / कमेंट

2021-07-07 10:04:43 The speed of gravity is same as the speed of light, this means that if the Sun suddenly disappeared, we would continue to orbit an empty space for more than eight minutes. And you might know that the Sun - in fact, our whole solar system - orbits around the center of the Milky Way Galaxy at an average velocity of 230 km/s. This means that Earth and all planets are not actually orbiting the sun, but rather where the Sun was 8 minutes and 20 seconds ago.

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2021-07-06 15:18:21 Waxing crescent moon in daylight.

Astronophilos ओपन / कमेंट

2021-07-05 16:43:25 Earth and Moon as Seen from Mars

This is an image of Earth and the moon, acquired on October 3, 2007, by the HiRISE camera on NASA's Mars Reconnaissance Orbiter. At the time the image was taken, Earth was 142 million km from Mars. By the way, did you know? HiRISE is a 50 cm reflector telescope. It is the largest telescope outside the Earth's orbit. It has a resolution of 30.48 cm per pixel at an altitude of 300 km. That’s even higher than most satellite images of Earth.

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2021-07-04 05:28:41 Titan's atmosphere extends about 600 km high, which makes it a lot higher than Earth's atmosphere. Titan was discovered after the Ganymede. Because titan's atmosphere is so high, it was thought to be the largest moon in the solar system for a long time. It wasn't until 1980 that Voyager was close enough to discover it was actually smaller than Ganymede. By the way, did you know? Titan is moving away from Saturn at a rate of 4.3 inches (11 cm) every year. And Earth's moon is drifting away from Earth at a rate of 3.8 cm every year.

NASA/JPL-Caltech/SSI ओपन / कमेंट