COLLECTED BY
Organization:
Internet Archive
The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the
Wayback Machine.
This collection contains web crawls performed by the UNT Libraries on the US Federal Executive, Legislative & Judicial branches of government in 2020-2021. The seeds for these crawls came from human-nominated URLs that can be viewed in the
Nomination Tool as well as from
lists generated by volunteers at UC San Diego and Environmental Data & Governance Initiative (EDGI).
The Wayback Machine - https://web.archive.org/web/20201219041204/https://science.nasa.gov/astrophysics/astrophysics-data-centers/high-energy-astrophysics-science-archive-research-center-heasarc
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High Energy Astrophysics Science Archive Research Center (HEASARC)
This web site is for scientists and astronomy enthusiasts seeking actual data from a multitude of space-based observatories. The High Energy Astrophysics Science Archive Research Center (HEASARC) is the primary archive for high-energy astronomy missions, in the extreme ultraviolet, X-ray and gamma-ray wavelengths. The HEASARC provides archival data, multi-mission software and analysis tools, and information about current and past observatory missions.
