EarthSky - Earth, Space, Human World, Tonight

Time 2020-07-21 04:05:01

Web Name: EarthSky - Earth, Space, Human World, Tonight

WebSite: http://earthsky.org

ID:30197

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Space,Earth,EarthSky,

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This study significantly changes the view of Venus from a mostly inactive planet to one whose interior is still churning and can feed many active volcanoes, one scientist said. On Venus, ring-like structures known as coronae dot the surface of the planet. They are thought to provide evidence of a warm interior for the planet, and for ongoing geologic activity. In the global map of Venus above, coronae determined to be active in the new study appear in red, and inactive coronae appear in white. Image via Anna J. P. Gülcher/ University of Maryland. Astronomer Guy Ottewell offers his insights and chart-making skills to you during this 2020 opposition of our solar system s golden and glorious planet of the rings, Saturn. View larger.https://earthsky.org/upl/2020/07/saturn-opposition-heliocentric-illustration-ottewell-lg.jpg | Saturn’s oppositions all around its 29.4-year orbit. The constellation boundaries are painted on an imaginary sphere of radius 11 astronomical units or AU (sun-Earth distances). Saturn’s mean distance from the Sun is 9.5 AU. The sightlines from Earth to Saturn are at the dates of opposition each year. Remember that the dates of Saturn's oposition are driven primarily by Earth's motino, in its smaller, faster orbit around the sun. Illustration via Guy Ottewell's blog. On Tuesday, July 21, 2020, 2 NASA astronauts will perform the 2nd in a pair of International Space Station (ISS) spacewalks, to finish a 3.5-year effort to upgrade the station’s power system. How to watch. Astronaut Chris Cassidy works during a spacewalk on July 16 to install lithium-ion batteries on the station. The orbiting lab was flying into an orbital sunrise at the time this photograph was taken. Image via NASA https://blogs.nasa.gov/spacestation/2020/07/17/spacewalk-preps-and-45-years-of-u-s-russian-space-cooperation-today/ Comet C/2020 F3 (NEOWISE) is becoming increasingly tough before sunup. It s magnificent now, through binoculars, in the northwest each evening. Easiest to see from northerly latitudes. Coming into view from further south. Not visible from the Southern Hemisphere. Charts and more info here. Location of Comet NEOWISE just after sunset from July 20 to 26. Face northwest at dusk, avoiding trees or buildings to have a clear view of the northwest horizon. Sweep with your binoculars around the location for the comet marked on this chart. Some might barely see it with the naked eye. Observers at lower latitudes will see Comet NEOWISE lower in the sky, while it will appear higher for observers farther north. This comet is not visible from the Southern Hemisphere. Illustration by Eddie Irizarry using Stellarium. Astronomers have spotted a classical nova outburst in a type of variable star that involves a white dwarf orbiting a main sequence star. Nova Reticulum 2020 has been briefly visible from the Southern Hemisphere. Observations of the cosmic microwave background by the Atacama Cosmology Telescope in Chile suggest that the universe is 13.8 billion years old. A portion of a new picture of the oldest light in the universe. This part covers a section of the sky 50 times the moon’s width, representing a region of space 20 billion light-years across. Image via Atacama Cosmology Telescope/ ACT Collaboration/ Simons Foundation. Today is the anniversary of The Day the Earth Smiled, the 3rd-ever image of Earth from the outer solar system, taken by the great Cassini spacecraft on July 19, 2013. Via NASA/JPL/SSI/CICLOPS / Mother Jones New moons generally can t be seen. They cross the sky with the sun during the day. This month s new moon happens on July 20 at 17:32 UTC. Solar Orbiter s new views are the closest images of the sun taken so far. This mosaic is the 1st-light image from the SoloHI telescope. What you're seeing here is light scattered by electrons in the solar wind. In this view, the sun is to the right of the frame, its light is blocked by a series of baffles. The partial ellipse visible on the right is the zodiacal light - what we on Earth sometimes call the false dawn - created by sunlight reflecting off the dust particles that are orbiting the sun. Along the lower edge of the upper left tile, you can see a small dot: the planet Mercury. The colossal iceberg that split from Antarctica’s Larsen C ice shelf in July 2017 is now in the open waters of the South Atlantic, about 650 miles (1,050 km) from its birthplace. Image via ESA http://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-1/Giant_A-68_iceberg_three_years_on Here are 10 of the coolest, weirdest and most unexpected findings about the Pluto system scientists have learned thanks to the New Horizons spacecraft s flyby of the distant world in 2015. Enhanced color global view of Pluto, taken when NASA's New Horizons spacecraft was 280,000 miles (450,000 km) away. Image via NASA/Johns Hopkins APL/Southwest Research Institute) Researchers suggest 110-120 million year old fossil footprints were made by ancient crocodiles that walked on 2 hind legs about the same length as adult human legs. A reconstruction of ancient South Korean crocodile track-makers. Image via Anthony Romilio https://stories.uq.edu.au/news/2020/ancient-crocodiles-walked-like-dinosaurs/index.html A new study from researchers at Vanderbilt University suggests that to find the most massive black holes, measure the effects of their gravitational waves on the flashes of light coming from pulsars. The best location to do that is at the precise gravitational center of the solar system. To find the largest, most massive black holes, find the exact center of gravity in the solar system. Scientists have now done that, to an accuracy of within 100 meters. Image via David Champion/ Vanderbilt University. 2020 EarthSky FundraiserAny amount will help us reach our goal and help feed a child.We will donate 8.5% of all incoming revenues from this campaign to No Kid Hungry.Would you considerIf you've already donated, we apologize for the popup and greatly appreciate your support.

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