Hollows are some of the youngest and brightest features on the surface of Mercury, and range in size from 60 feet to over a mile across and 60 to 120 feet deep. This premium worksheet bundle contains a printable fact file and 10 fun and engaging worksheets to challenge your students and help them learn about Mercury. The morning Sun appears to rise briefly, set and rise again from some parts of the planet's surface. When the ions strike the surface, they knock off neutrally charged atoms and send them on a loop high into the sky. Mercury’s crust has no tectonic plates and its iron core is enormous, making up 85% of the planets radius while Earth’s inner and outer core, account for about 55%.

3 [131], The ancients knew Mercury by different names depending on whether it was an evening star or a morning star. The only other planet to behave this way is Mercury. 56:59 Could you use the transit method to communicate between stars? - NASA’s spacecraft Mariner 10 was the first mission to explore Mercury in 1974-1975. Combined with the fact that Jupiter is a gas giant, this means the planet experiences significant bulging at its equator. Thus Mercury does not have an atmosphere, but it does have a thin exosphere. Despite its proximity to the Sun, Mercury is not the hottest planet in our solar system – that title belongs to nearby Venus, thanks to its dense atmosphere. [123][124] At greatest western elongation, Mercury rises at its earliest before sunrise, and at greatest eastern elongation, it sets at its latest after sunset.[125]. These features have indicated that Mercury’s radius became smaller, shrinking in the range of 1 to 7 km or 4 miles. It takes sunlight 3.2 minutes to travel from the Sun to Mercury. Despite its proximity to the Sun, Mercury is not the hottest planet in our solar system.

) [125] In both of these cases, the angle at which the planet's orbit intersects the horizon is maximized, allowing it to rise several hours before sunrise in the former instance and not set until several hours after sundown in the latter from southern mid-latitudes, such as Argentina and South Africa.[125]. Site Manager: Please refresh the page and try again. More accurate modeling based on a realistic model of tidal response has demonstrated that Mercury was captured into the 3:2 spin–orbit state at a very early stage of its history, within 20 or 10 million years after its formation. With a mean diameter of 120,536 km (74897.6 mi), Saturn is the second largest planet in the Solar System. This is because, coincidentally, Mercury's rotation period is almost exactly half of its synodic period with respect to Earth. At its closest distance or perihelion, it is 0.30 AU away from the Sun.

Mercury spins slowly compared to Earth, so one day lasts a long time. Mercury has a mass of 3.3 x 1023kilograms. As with the other planets in the inner Solar System (Venus, Earth, and Mars), Mercury is a terrestrial planet, which means it is composed primarily of metals and silicate rocks that are differentiated into an iron-rich core and a silicate mantle and crust. From the surface of Mercury, the Sun would appear more than three times as large as it does when viewed from Earth, and the sunlight would be as much as seven times brighter. CS1 maint: DOI inactive as of August 2020 (. https://www.universetoday.com/newsletter, Weekly Space Hangout: [74][75] Because of the quantities of these ions that were detected in Mercury's space environment, scientists surmise that these molecules were blasted from the surface or exosphere by the solar wind.

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