12. In theory, what's Venus expected to be like A. It is almost as large as Earth. B. It has nearly the same mass as Earth. C. It has a warmer Earth-like climate. D. It has the unbearable surface and atmosphere. 13. What can the discovery of phosphine on Venus indicate ...
there is the hypothesis proposed by researchers Alex Alemi and David Stevenson of theCalifornia Institute of Technologyin 2006, suggesting that in the early days of the formation of the solar system, Venus must have been bombarded by manyasteroids, which released large quantities of ejecta into Ve...
Sundews range from the penny-sized pygmy species to the "giant" (Drosera dichotoma) that can reach 4 feet (1.2 meters) in diameter. This rare, beautiful flower is large relative to the size of the plant. They typically are white to pink, but some groups have orange, red, yellow or pal...
Brown Jr., Near-Earth Object Survey, seeks to detect 90 percent of near-Earth objects 459 feet (140 meters) in diameter or greater by 2020. Both surveys rely on powerful telescopes to repeatedly scan large areas of the sky. As of March 2012, those telescopes had discovered 8,818 near-Ea...
These questions were answered in 2006 when scientific models suggested that Venus used to have a moon. The planet didn't escape the solar system debris and was actually hit twice. In the first barrage, which happened early in its life, the planet was hit by matter large enough to form a...
How big is Mercury vs Pluto? The diameter of Mercury is 4,879.4 km across, while Pluto's diameter is 2,360 km across. SoMercury is about twice as large Pluto. And just for comparison, Pluto is only 18% the diameter of Earth, while Mercury is 38% the diameter of Earth. When it co...
How Is a Satellite Launched Into an Orbit? All satellites today get into orbit by riding on a rocket. Many used to hitch a ride in the cargo bay of the space shuttle. Several countries and businesses have rocket launch capabilities, and satellites as large as several tons make it into orb...
The rete (sounds like "treaty") rested on top of the plates. Modern retes are often made of transparent plastic so you can see through them to the plates below. To get the same effect in the ancient world, astrolabe makers cut away large portions of the metal, leaving behind a skeletal...
A telescope's ability to collect light is directly related to the diameter of the lens or mirror -- the aperture -- that is used to gather light. Generally, the larger the aperture, the more light the telescope collects and brings to focus, and the brighter the final image. The tele...
How much smaller is Venus than the sun? Is the International Space Station in the thermosphere? Which is bigger: UY Scuti or VY Canis Majoris? How big is Lexell's Comet? How big is the large Magellanic cloud? What are the characteristics of the exosphere?