科学与环境
A new view of the gamma-ray gap: 14 years of Fermi data reveal around 450 sources in a largely unexplored energy range
来源: Phys.org - latest science and technology news stories · 发布于
The universe is filled with light at many different energies. Some of it is invisible to our eyes, including extremely energetic gamma rays, which can only be produced in the most extreme environments in our universe, for example supermassive black holes, exploding stars or astro
The universe is filled with light at many different energies. Some of it is invisible to our eyes, including extremely energetic gamma rays, which can only be produced in the most extreme environments in our universe, for example supermassive black holes, exploding stars or astrophysical jets. To "see" gamma rays, astrophysicists use particle experiments in space, such as the Fermi-Large Area Telescope (Fermi-LAT).
This instrument was launched into space by NASA in 2008, and it can detect photons from 20 megaelectronvolts (MeV, a unit of energy) to beyond 1 teraelectronvolt (TeV).
相关报道
NASA’s CHAPEA Mars crew finally emerges after more than a year in isolation
After more than a year of simulated life on Mars, four NASA volunteers have finally emerged from isolation, bringing a remarkable space exploration experiment to an end. Their experiences growing food, conserving resources, and overcoming Mars-like challenges could help NASA prep
All Top News -- ScienceDaily ·
NASA is racing against time to save the Hubble Space Telescope
NASA is exploring a daring plan to save the legendary Hubble Space Telescope from its eventual fiery plunge into Earth's atmosphere. After more than 35 years of groundbreaking discoveries, Hubble is slowly losing altitude, and without intervention, it could fall back to Earth as
All Top News -- ScienceDaily ·
Some under-25s should get fewer benefits, Milburn review to say
The proposed radical overhaul of the welfare system would move under-25s off the main sickness benefits.
feeds.bbci.co.uk ·
NASA’s Parker Solar Probe discovers a hidden pattern in the Sun’s chaotic magnetic fields
NASA’s Parker Solar Probe has revealed a surprising secret hidden within the chaos of space: turbulent magnetic fields reverse their direction of rotation when examined at extremely small scales. The discovery exposes an unexpected pattern in solar wind turbulence that could help
All Top News -- ScienceDaily ·
NASA reveals Earth's ozone hole has grown to a size not seen in a decade
The Antarctic ozone hole expanded to its seventh-largest size on record in 2026, driven by unusual weather conditions that pushed it close to its historic maximum. Scientists say international restrictions on ozone-destroying chemicals prevented even greater damage, and Earth's p
All Top News -- ScienceDaily ·