Located about 1,600 light-years apart, one weighs 6 million solar masses and the other more than 150 million Suns. The animation shows two monster black holes in the galaxy known as NGC 7727. Its shadow diameter spans about half that of Mercury’s orbit in our solar system. The black hole at the heart of our own galaxy, called Sagittarius A* (pronounced ay-star), boasts the weight of 4.3 million Suns based on long-term tracking of stars in orbit around it. The matter is so compressed that even the black hole’s shadow is smaller than our Sun. “How do they get so big? When galaxies collide, their central black holes eventually may merge together too.”įirst up is 1601+3113, a dwarf galaxy hosting a black hole packed with the mass of 100,000 Suns. “Direct measurements, many made with the help of the Hubble Space Telescope, confirm the presence of more than 100 supermassive black holes,” said Jeremy Schnittman, a theorist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. Credit: NASA’s Goddard Space Flight Center Conceptual Image Lab Download this video in HD formats from NASA Goddard’s Scientific Visualization Studio. Scientists think all of these objects shine most intensely in ultraviolet light. Smaller black holes are shown in bluish colors because their gas is expected to be hotter than that orbiting larger ones. Only one of these colossal objects resides in our own galaxy, and it lies 26,000 light-years away. The black holes shown, which range from 100,000 to more than 60 billion times our Sun’s mass, are scaled according to the sizes of their shadows – a circular zone about twice the size of their event horizons. Watch this video to see how they compare to each other and to our solar system. 3 p.m.All monster black holes are not equal.– NASA Earth Science Division Director Karen St. Log on to NASA’s virtual event and hear from featured live speakers: – Join us on Twitter at to learn about the latest in NASA’s climate research. Highlights of NASA Earth Day content and activities next week (all times Eastern):Ģ p.m. For the first time, this year’s poster also has QR codes that tell the story of NASA’s Earth and climate science. NASA’s Science Mission Directorate also has revealed the 2022 Earth Day poster, available to download in English and Spanish from an online toolkit that also includes wallpapers and a special video from its creative director. On Earth Day, the collective images will show the stunning breadth and variety of life that persists, survives, and thrives right here on Earth. To participate, visit:Ĭonnect with us this Earth Day on social media with the tag #NASAEarthling to show off what makes life on our planet truly special – you. Some content also will be available in Spanish. The virtual event will include live talks, conversation with scientists, a learning zone for students and other activities. In conjunction with the in-person event, NASA also will host Earth Day online, with live events April 22 and site access through Monday, May 2. The event will feature information about NASA science, live demonstrations, and other family friendly activities. NE in Washington, Friday, April 22 (Earth Day) through Sunday, April 24, from noon to 5 p.m. To celebrate Earth Day, NASA will host a free, public event at Union Station’s Main Hall, located at 40 Massachusetts Ave. Understanding Earth gives us the means to better protect it and help ourselves. As NASA returns humans to the Moon and eventually to Mars, NASA’s Earth science and climate research provides a global mosaic of Earth’s changes over time, enabling us to study the causes and effects of natural and human events. The iconic 1968 Apollo 8 “Earthrise” photo of our planet appearing over the Moon’s horizon helped unite a generation into appreciating the fragility and beauty of Earth. NASA’s space exploration continues to inspire us to be better stewards of our planet and Earth Day is a great time to celebrate what we’ve done and can do to keep Earth everyone’s favorite planet in the universe. The iconic “Earthrise” image of Earth appearing over the Moon’s horizon as seen from the Apollo 8 spacecraft, taken during a live broadcast with NASA astronauts from the lunar orbit on Christmas Eve, Dec.
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