New work agrees with older research suggesting the oldest light in the universe – from the most distant galaxy yet known – started its journey toward us 13.77 billion years ago. Source: https://earthsky.org/space/a-new-look-at-the-universes-oldest-light…
Tag: measurements
New and rare direct image of a brown dwarf
Astronomers have obtained one of the best images yet of a brown dwarf, an object in a mass range midway between stars and planets. This brown dwarf – called HD 33632 Ab – lies 86 light-years from our sun. Source: https://earthsky.org/space/new-brown-dwarf-direct-image-hd-33632-ab…
Was 2020 the World’s Warmest Year Ever?
“New data from EU satellites shows that 2020 is in a statistical dead heat with 2016 as the world’s warmest year,” reports the BBC (in an article shared by long-time Slashdot reader AmiMoJo):
The Copernicus Climate Change Service says that last year was around 1.25C above the long-term average. The scientists say that unprecedented levels of heat in the Arctic and Siberia…
What are degrees, arc minutes and arc seconds?
How do skywatchers measure distances in the night sky? Here’s how to understand it when they speak of objects as being several degrees (or several arc minutes or arc seconds) apart. Source: https://earthsky.org/astronomy-essentials/sky-measurements-degrees-arc-minutes-arc-seconds…
Meet PitRanger: Tiny rover designed to probe the lunar underworld
Researchers have been busily building a prototype of a 33-pound (15 kg) lunar mini-robot, set to be the key instrument in a future mission aimed at capturing high-definition images of moon pits. Source: https://earthsky.org/space/meet-pitranger-a-tiny-rover-to-probe-lunar-underworld…
No leap second for December 31, 2020
World timekeepers have decreed there will be no leap second on December 31, 2020. Source: https://earthsky.org/human-world/leap-second-june-30-december-31-why-need-controversy…
C1-23152: An ancient galaxy that built itself
A popular theory of galaxy formation suggests that small galaxies merged to form larger ones. But galaxy C1-23152 – 12 billion light-years from Earth – apparently formed itself from gas in the early universe, via exceedingly rapid star formation. Source: https://earthsky.org/space/c1-23152-galaxy-built-itself-not-via-galaxy-merger…
Multi-messenger astronomy offers new estimates of neutron star size and universe expansion
A combination of astrophysical measurements has allowed researchers to put new constraints on the radius of a typical neutron star and provide a novel calculation of the Hubble constant that indicates the rate at which the universe is expanding. Source: https://phys.org/news/2020-12-multi-messenger-astronomy-neutron-star-size.html…
Amazon Wants To Scan Your Body To Make Perfectly Fitting Shirts
An anonymous reader quotes a report from Fast Company: For just $25, Amazon wants to make you a custom T-shirt. And a virtual body double. This week, the company unveiled a brand called “Made for You” that creates made-to-measure clothes. The initial product, a T-shirt, can be personalized to your taste and measurements, and more products are coming. This is Amazon’s…
What are your chances of a white Christmas this year?
Dreaming of a white Christmas? Here’s a map depicting which places in the US have the best chance of being snowy on Christmas Day 2020. Source: https://earthsky.org/earth/chances-of-white-christmas-us-2020…