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In Depth | Sun – NASA Solar System Exploration The Sun is a 4 5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star Without the Sun’s energy, life as we know it could not exist on our home planet From our vantage point on Earth, the Sun may appear like an
Nature’s light show: Saturn’s aurora - NASA Solar System Exploration * Outline How the solar wind affects Saturn’s magnetosphere Why do we care? Saturn’s aurora: a global view Recent Cassini auroral discoveries What are we looking for next? The 2013 and 2014 auroral campaigns Summary * Science Objective ‘To characterise the structure of the magnetosphere and its interactions with the solar wind, Saturn’s moons and rings ’ NASA We are studying how the
Planet Compare - NASA Solar System Exploration NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system
Nature s light show: Saturn s aurora - NASA Solar System Exploration Has the solar activity changed? The observations just shown occurred when solar activity was minimum in its 11 year cycle, as indicated in this plot of sunspot number Now we are at solar maximum and the Sun is much more active (although still quiet compared to 11 years ago) 23
Space Weather at Saturn Observations during the 2013 auroral observing . . . * What is Space Weather? The surface of the Sun is very dynamic and exhibits holes, loops, flares and transient structures like Coronal Mass Ejections (CMEs) The Sun’s atmosphere expands to fill the solar system, forming the solar wind, which blows past the planets The effect of the Sun on the near-space environment of the planets (L) Solar prominences and (R) a CME ejecting from the solar
Solar System Exploration Stories - NASA Science Planets, Solstice, and the Galaxy Venus and Saturn separate, while Mars hangs out in the evening Plus the June solstice, and dark skies reveal our home galaxy in all of its glory Skywatching Highlights All Month – Planet Visibility: Daily…
In Depth | Our Solar System – NASA Solar System Exploration The planetary system we call home is located in an outer spiral arm of the Milky Way galaxy Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids Beyond our own solar system, there
Juno Mission to Jupiter - NASA Solar System Exploration Juno Mission to Jupiter With the exception of the sun, Jupiter is the most dominant object in the solar system Because of its enormous size and the fact that it was likely the first of the planets to form, it has profoundly influenced the formation and evolution of the other bodies that orbit our star NASA’s Juno mission will allow us to examine this gas giant planet from its innermost
In Depth | Earths Moon – NASA Solar System Exploration The brightest and largest object in our night sky, the Moon makes Earth a more livable planet by moderating our home planet's wobble on its axis, leading to a relatively stable climate It also causes tides, creating a rhythm that has guided humans for thousands of years The Moon was likely formed after a Mars-sized body collided with Earth several billion years ago Earth's Moon is the only