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Hubble’s Contentious Constant Poster
Universe
Sep 20, 2017
There are two leading ways to measure the universe's rate of expansion, and for fifteen years, they more or less agreed with one another. Not anymore, and that’s a big deal.
Universe, Solar System
Nov 18, 2014
Nov 18, 2014: Born from the rubble of a violent collision, hurled through space for millions of years and dismembered by the gravity of planets, asteroid Bennu had a tough life in a rough neighborhood: the early solar system. "Bennu's Journey," a new animation... Read More
Nov 18, 2014
Nov 18, 2014: Images taken by the Rosetta spacecraft's OSIRIS imaging system show the portions of the journey its Philae comet lander undertook on Nov. 12, as it approached and then rebounded off the surface of comet 67P/Churyumov-Gerasimenko.
Universe, Solar System
Nov 17, 2014
November 17, 2014: Images from NASA's Dawn Mission have been used to create a series of high-resolution geological maps of the large asteroid Vesta, revealing the variety of surface features in unprecedented detail. These maps are included with a series of 11 scientific papers... Read More
Nov 16, 2014
Nov 16, 2014: A map released by NASA's Near Earth Object (NEO) Program reveals that small asteroids frequently enter and disintegrate in the Earth's atmosphere with random distribution around the globe. Released to the scientific community, the map visualizes data gathered by U.... Read More
Universe, Sun
Nov 6, 2014
Nov 6, 2014: A NASA sounding rocket experiment has detected a surprising surplus of infrared light in the dark space between galaxies, a diffuse cosmic glow as bright as all known galaxies combined. The glow is thought to be from orphaned stars flung out of galaxies... Read More
Solar System
Nov 3, 2014
Nov 3, 2014: Generally speaking, space missions fall into one of three categories:  difficult, more difficult, and ridiculously difficult. Flybys are difficult.  A spaceship travels hundreds of millions of miles through the dark void of space, pinpoints a... Read More
Solar System
Nov 3, 2014
The European Space Agency's Rosetta spacecraft is about to attempt something "ridiculously difficult" - landing a probe on the surface of a speeding comet.
ScienceCasts: How to Land on a Comet
Universe
Oct 31, 2014
Oct 31, 2014: As the European Space Agency prepares to drop a lander on Comet 67P/Churyumov-Gerasimenko on Nov. 12th, the comet is showing signs of increased activity.
Earth
Oct 30, 2014
Oct 30, 2014: The Antarctic ozone hole reached its annual peak size on Sept. 11, according to scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA). The size of this year’s hole was 24.1 million square kilometers (9.3 million square miles) — an area roughly the size... Read More
Universe, Solar System
Oct 23, 2014
Oct 23, 2014: NASA’s Hubble Space Telescope has produced a unique composite image of comet Siding Spring as it made its never-before-seen close passage of a comet by Mars. Siding Spring, officially designated Comet C/2013 A1, made its closest approach to Mars at 2:28 p.m. EDT on Oct. 19, at a... Read More
Solar System
Oct 17, 2014
On October 23rd, the Moon will pass in front of the sun, off-center, producing a partial solar eclipse visible in most of the United States.
ScienceCasts: Sunset Solar Eclipse
Universe, Sun
Oct 17, 2014
Oct. 17, 2014:  Waking up before sunrise is a good way to get a head start on the day. On Oct. 21st, waking up before sunrise could stop you in your tracks. Blame Halley’s Comet.  Every year in mid-to-late October, Earth passes through a stream of dusty... Read More
Sun, Solar System
Oct 17, 2014
Oct 17, 2014: Sunsets are always pretty.  One sunset this month could be out of this world. On Thursday, Oct. 23rd, the setting sun across eastern parts of the USA will be red, beautiful and … crescent-shaped.  "It's a partial solar eclipse," explains longtime NASA eclipse expert Fred... Read More
Universe, Solar System
Oct 16, 2014
Oct 16, 2014:   Peering out to the dim, outer reaches of our solar system, NASA’s Hubble Space Telescope has uncovered three Kuiper Belt objects (KBOs) the agency’s New Horizons spacecraft could potentially visit after it flies by Pluto in July 2015. The KBOs were detected through a... Read More