NASA's Goddard Space Flight Center
18 Nov 2021, 18:00 UTC
From its vantage point high above Earth’s atmosphere, NASA’s Hubble Space Telescope has completed this year's grand tour of the outer solar system – returning crisp images that complement current and past observations from interplanetary spacecraft. This is the realm of the giant planets – Jupiter, Saturn, Uranus, and Neptune – extending as far as 30 times the distance between Earth and the Sun.
Hubble's Grand Tour of the Outer Solar System
18 Nov 2021, 18:00 UTC
From its vantage point high above Earth’s atmosphere, NASA’s Hubble Space Telescope has completed this year's grand tour of the outer solar system – returning crisp images that complement current and past observations from interplanetary spacecraft. This is the realm of the giant planets – Jupiter, Saturn, Uranus, and Neptune – extending as far as 30 times the distance between Earth and the Sun.
NASA's Goddard Space Flight Center
16 Nov 2021, 14:00 UTC
Stars are born from turbulent clouds of gas and dust that collapse under their own gravitational attraction. As the cloud collapses, a dense, hot core forms and begins gathering dust and gas, creating a protostar. This star-forming nebula in the constellation Aquila, G035.20-0.74, is known for producing a particular kind of massive star known as a B-Type star. These stars are hot, young, blue stars up to five times hotter than our Sun.
Nebula Churns out Massive Stars in New Hubble Image
16 Nov 2021, 14:00 UTC
Stars are born from turbulent clouds of gas and dust that collapse under their own gravitational attraction. As the cloud collapses, a dense, hot core forms and begins gathering dust and gas, creating a protostar. This star-forming nebula in the constellation Aquila, G035.20-0.74, is known for producing a particular kind of massive star known as a B-Type star. These stars are hot, young, blue stars up to five times hotter than our Sun.
NASA's Goddard Space Flight Center
15 Nov 2021, 14:00 UTC
This Hubble image captures a portion of a dark nebula in the constellation Cepheus. LDN 1165 is part of a collection called Lynds’ Catalog of Dark Nebulae, originally published in 1962. Dark nebulae – also called absorption nebulae – are clouds of gas and dust that neither emit nor reflect light, instead blocking light coming from behind them. These nebulae tend to contain large amounts of dust, which allows them to absorb visible light from stars or nebulae beyond them. Dark nebulae are so dark that they’ve been referred to as “holes in the sky,” but in reality they may be full of activity, with stars sometimes forming inside their dense clouds.
Hubble Images Dark Nebula Cloaking Stars Within Dusty Depths
15 Nov 2021, 14:00 UTC
This Hubble image captures a portion of a dark nebula in the constellation Cepheus. LDN 1165 is part of a collection called Lynds’ Catalog of Dark Nebulae, originally published in 1962. Dark nebulae – also called absorption nebulae – are clouds of gas and dust that neither emit nor reflect light, instead blocking light coming from behind them. These nebulae tend to contain large amounts of dust, which allows them to absorb visible light from stars or nebulae beyond them. Dark nebulae are so dark that they’ve been referred to as “holes in the sky,” but in reality they may be full of activity, with stars sometimes forming inside their dense clouds.
NASA's Goddard Space Flight Center
12 Nov 2021, 14:00 UTC
This NASA Hubble Space Telescope image captures a portion of the reflection nebula IC 2631 that contains a protostar, the hot, dense core of a forming star that is accumulating gas and dust. Eventually the protostar may gravitationally gather enough matter to begin nuclear fusion and emit its own energy and starlight.
Reflected Starlight Bathes Forming Star in New Hubble Image
12 Nov 2021, 14:00 UTC
This NASA Hubble Space Telescope image captures a portion of the reflection nebula IC 2631 that contains a protostar, the hot, dense core of a forming star that is accumulating gas and dust. Eventually the protostar may gravitationally gather enough matter to begin nuclear fusion and emit its own energy and starlight.
NASA's Goddard Space Flight Center
9 Nov 2021, 15:00 UTC
A team of scientists has forecast the scientific impact of the Nancy Grace Roman Space Telescope’s High Latitude Wide Area Survey on critical questions in cosmology. This observation program will consist of both imaging, which reveals the locations, shapes, sizes, and colors of objects like distant galaxies, and spectroscopy, which involves measuring the intensity of light from those objects at different wavelengths, across the same enormous swath of the universe. Scientists will be able to harness the power of a variety of cross-checking techniques using this rich data set, which promises an unprecedented look into some of cosmology’s most vexing problems.
NASA’s Roman Mission Will Help Empower a New Era of Cosmological Discovery
9 Nov 2021, 15:00 UTC
A team of scientists has forecast the scientific impact of the Nancy Grace Roman Space Telescope’s High Latitude Wide Area Survey on critical questions in cosmology. This observation program will consist of both imaging, which reveals the locations, shapes, sizes, and colors of objects like distant galaxies, and spectroscopy, which involves measuring the intensity of light from those objects at different wavelengths, across the same enormous swath of the universe. Scientists will be able to harness the power of a variety of cross-checking techniques using this rich data set, which promises an unprecedented look into some of cosmology’s most vexing problems.
NASA's Goddard Space Flight Center
8 Nov 2021, 14:00 UTC
This image shows knots of cold, dense interstellar gas where new stars are forming. These Free-floating Evaporating Gaseous Globules (frEGGs) were first seen in Hubble’s famous 1995 image of the Eagle Nebula. Because these lumps of gas are dark, they are rarely seen by telescopes. They can be observed when the newly forming stars ignite, their intense ultraviolet radiation eroding the surrounding gas away and letting the denser, more resistant frEGGs remain. These frEGGs are located in the Northern Coalsack Nebula in the direction of Cygnus, the Swan.
Hubble Spots Dark Star-Hatching frEGGs
8 Nov 2021, 14:00 UTC
This image shows knots of cold, dense interstellar gas where new stars are forming. These Free-floating Evaporating Gaseous Globules (frEGGs) were first seen in Hubble’s famous 1995 image of the Eagle Nebula. Because these lumps of gas are dark, they are rarely seen by telescopes. They can be observed when the newly forming stars ignite, their intense ultraviolet radiation eroding the surrounding gas away and letting the denser, more resistant frEGGs remain. These frEGGs are located in the Northern Coalsack Nebula in the direction of Cygnus, the Swan.
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16 Nov 2021, 15:55 UTC
As originally planned, Juno’s 37th close pass by Jupiter – called Perijove 37 – would have been its last. Per the original mission outline, the Juno spacecraft would have been programed to plunge into Jupiter on Perijove 37 as a mission-ending self-sacrifice. Destroying Juno would protect the Jovian moons from potential contamination from any microbes from Earth that may have attached itself to spacecraft.
This was Juno’s View on its 37th Flight Past Jupiter
16 Nov 2021, 15:55 UTC
As originally planned, Juno’s 37th close pass by Jupiter – called Perijove 37 – would have been its last. Per the original mission outline, the Juno spacecraft would have been programed to plunge into Jupiter on Perijove 37 as a mission-ending self-sacrifice. Destroying Juno would protect the Jovian moons from potential contamination from any microbes from Earth that may have attached itself to spacecraft.
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I’m looking at a paper just accepted at The Astrophysical Journal on the subject of panspermia, the notion that life may be distributed through the galaxy by everything from interstellar dust to comets and debris from planetary impacts. We have no hard data on this — no one knows whether panspermia actually occurs from one planet to another, much less from one stellar system to another star. But we can investigate possibilities based on what we know of everything from the hardiness of organisms to the probabilities of ejecta moving on an interstellar trajectory.
Probing the Likelihood of Panspermia
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I’m looking at a paper just accepted at The Astrophysical Journal on the subject of panspermia, the notion that life may be distributed through the galaxy by everything from interstellar dust to comets and debris from planetary impacts. We have no hard data on this — no one knows whether panspermia actually occurs from one planet to another, much less from one stellar system to another star. But we can investigate possibilities based on what we know of everything from the hardiness of organisms to the probabilities of ejecta moving on an interstellar trajectory.
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There are over 100 known elements in the periodic table. These 8 ways of making them account for every one.
The 8 ways that all the elements in the Universe are made
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There are over 100 known elements in the periodic table. These 8 ways of making them account for every one.
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