Venus, at its brightest, is brighter than any other planet. However, when it's not at its brightest, there are a couple of others than can be brighter if they're near their brightest, Mars and Jupiter being the most notable.
Venus is occasionally brighter than jupiter
Yes
Yes, Venus is the brightest natural object in the sky after the Sun and the Moon. Its brightness is due to its proximity to Earth, its highly reflective atmosphere, and its thick cloud cover that reflects sunlight.
No planet is 20 times bigger than the Sun. The Sun is the largest body in our solar system and is much larger than any planet.
Venus, at its brightest, is brighter than any other planet. However, when it's not at its brightest, there are a couple of others than can be brighter if they're near their brightest, Mars and Jupiter being the most notable.
For us, it looks brighter than any star, but this is because it is much nearer. Now (March/April 2012) you can see two bright "stars" in the west, after sunset - the brighter one is planet Venus, the second-brightest one is planet Jupiter. In terms of absolute brightness, a star is brighter than a planet.
Venus is occasionally brighter than jupiter
Yes
I'm not sure what "first" means in this context. Venus can be closer to Earth than any other planet, and Venus can be brighter than any other planet, but it's not so all the time.
I am not sure how frequent this confusion is, but Venus is brighter than any other planet or star, and can easily be seen in the daylight.
Yes, Venus is the brightest natural object in the sky after the Sun and the Moon. Its brightness is due to its proximity to Earth, its highly reflective atmosphere, and its thick cloud cover that reflects sunlight.
The star Canopus is brighter than Sirius. Canopus is the second brightest star in the night sky after Sirius and can be seen from most parts of the Earth's surface.
Venus is the brightest, then Jupiter and mars. All of these can potentially be brighter than sirus, but have to be well placed in their orbits relative to us.
No. As seen from Earth the "evening star," which is actually the planet Venus, is the second brightest object in the night sky. Only the moon is brighter.
Whenever Venus is visible in the sky, it is brighter than any other planet, and brighter than any star. Venus can't get farther than about 48° from the Sun, so you can see it sometimes in the evening after sunset, and sometimes in the morning before sunrise. (Actually you can see it in the daytime as well, but only if you know exactly where to look.)In July 2017, Venus is visible in the morning, before sunrise. Just look out for a very bright star.
No, a welder is not brighter than the sun. The sun is a star and emits much more light and energy than any welding process.