Editing Space exploration (section)

===First telescopes===
The first [[telescope]] is said to have been invented in 1608 in the [[Netherlands]] by an [[eyeglass]] maker named [[Hans Lippershey]], but their first recorded use in astronomy was by [[Galileo Galilei]] in 1609.<ref>{{cite book |author=King, C. C.|date=2003|title=The History of the Telescope|publisher=Dover Publications|pages=30–32|isbn=978-0-486-43265-6}}</ref> In 1668 [[Isaac Newton]] built [[Newton's reflector|his own]] [[reflecting telescope]], the first fully functional telescope of this kind, and a landmark for future developments due to its superior features over the previous [[Refracting telescope#Galilean telescope|Galilean telescope]].<ref name="books.google.com">{{cite book|author=A. Rupert Hall|title=Isaac Newton: Adventurer in Thought|url=https://archive.org/details/isaacnewtonadven0000hall|url-access=registration|year=1996|publisher=Cambridge University Press|isbn=978-0-521-56669-8|page=[https://archive.org/details/isaacnewtonadven0000hall/page/67 67]}}</ref>

A string of [[Timeline of discovery of Solar System planets and their moons|discoveries in the Solar System]] (and beyond) followed, then and in the [[Scientific Revolution|next centuries]]: the [[Lunar craters|mountains of the Moon]], the [[phases of Venus]], [[Galilean Moons|the main satellites]] of [[satellites of Jupiter|Jupiter]] and [[Satellites of Saturn|Saturn]], the [[Saturn's rings|rings of Saturn]], many [[comet]]s, the [[asteroid]]s, the new planets [[Uranus]] and [[Neptune]], and many more [[List of natural satellites|satellites]].

The [[Orbiting Astronomical Observatory 2]] was the first [[space telescope]] launched 1968,<ref name=joseph>{{cite book|first=Joseph A.|last=Angelo|title=Spacecraft for Astronomy |url= https://books.google.com/books?id=y8BMepjeciEC&pg=PA20|year=2014|publisher=Infobase Publishing|isbn=978-1-4381-0896-4|page=20}}</ref> but the launching of [[Hubble Space Telescope]] in 1990<ref>{{cite web |url=http://science.ksc.nasa.gov/shuttle/missions/sts-31/mission-sts-31.html |title=STS-31 |publisher=NASA |access-date=April 26, 2008 |archive-date= August 15, 2011 |archive-url= https://web.archive.org/web/20110815191242/http://science.ksc.nasa.gov/shuttle/missions/sts-31/mission-sts-31.html |url-status=live }}</ref> set a milestone. As of 1 December 2022, there were 5,284 confirmed [[Lists of exoplanets|exoplanets]] discovered. The [[Milky Way]] is estimated to contain 100–400 billion [[star]]s<ref>{{cite web |url= http://asd.gsfc.nasa.gov/blueshift/index.php/2015/07/22/how-many-stars-in-the-milky-way/ |title=How Many Stars in the Milky Way? |work=NASA Blueshift |url-status=live |archive-url= https://web.archive.org/web/20160125140109/http://asd.gsfc.nasa.gov/blueshift/index.php/2015/07/22/how-many-stars-in-the-milky-way/ |archive-date=25 January 2016 }}</ref> and more than 100 billion [[planets]].<ref name="Space-20130102">{{cite news |author=|title=100 Billion Alien Planets Fill Our Milky Way Galaxy: Study |url=http://www.space.com/19103-milky-way-100-billion-planets.html |date=2 January 2013 |work=[[Space.com]] |access-date= |archive-url=https://web.archive.org/web/20130103060601/http://www.space.com/19103-milky-way-100-billion-planets.html |archive-date=3 January 2013 |url-status=live}}</ref> There are at least 2 trillion [[galaxy|galaxies]] in the [[observable universe]].<ref name="Conselice">{{cite journal |title= The Evolution of Galaxy Number Density at ''z'' < 8 and Its Implications |first=Christopher J. |last=Conselice |display-authors=etal |journal=The Astrophysical Journal |volume= 830 |issue=2 |year=2016 |arxiv=1607.03909v2 |bibcode= 2016ApJ...830...83C |doi=10.3847/0004-637X/830/2/83 |page=83|s2cid=17424588 |doi-access=free }}</ref><ref name="NYT-20161017">{{cite news |last=Fountain |first=Henry |title=Two Trillion Galaxies, at the Very Least |url=https://www.nytimes.com/2016/10/18/science/two-trillion-galaxies-at-the-very-least.html |date=17 October 2016 |work=[[The New York Times]]|access-date=17 October 2016 }}</ref> [[HD1]] is the [[List of the most distant astronomical objects|most distant]] known object from Earth, reported as 33.4 billion [[light-year]]s away.<ref name="ALMA-20220407">{{cite news |last1=Lira |first1=Nicolás |last2=Iono |first2=Daisuke |last3=Oliver |first3=Amy C. |last4=Ferreira |first4=Bárbara |date=7 April 2022 |title=Astronomers Detect Most Distant Galaxy Candidate Yet |url=https://www.almaobservatory.org/en/press-releases/astronomers-detect-most-distant-galaxy-candidate-yet/ |url-status=dead |archive-url=https://web.archive.org/web/20220717040741/https://www.almaobservatory.org/en/press-releases/astronomers-detect-most-distant-galaxy-candidate-yet/ |archive-date=17 July 2022 |accessdate=8 April 2022 |work=[[Atacama Large Millimeter Array]]}}</ref><ref name="ARX-20220212">{{cite journal |author=Harikane, Yuichi |display-authors=et al. |title=A Search for H-Dropout Lyman Break Galaxies at z ∼ 12–16 |journal=The Astrophysical Journal |arxiv=2112.09141 |date=2 February 2022 |volume=929 |issue= 1 |page=1 |doi=10.3847/1538-4357/ac53a9 |bibcode=2022ApJ...929....1H |s2cid=246823511 |doi-access=free }}</ref><ref name="NS-20220407">{{cite news |last=Crane |first=Leah |title= Astronomers have found what may be the most distant galaxy ever seen – A galaxy called HD1 appears to be about 33.4 billion light years away, making it the most distant object ever seen – and its extreme brightness is puzzling researchers |url=https://www.newscientist.com/article/2315330-astronomers-have-found-what-may-be-the-most-distant-galaxy-ever-seen/ |date=7 April 2022 |work=[[New Scientist]] |accessdate=8 April 2022 }}</ref><ref name="MN-20220407">{{cite journal |author=Pacucci, Fabio |display-authors=et al. |title=Are the newly-discovered z ∼ 13 drop-out sources starburst galaxies or quasars? |date=7 April 2022 |journal=[[Monthly Notices of the Royal Astronomical Society]] |volume=514 |pages=L6–L10 |doi=10.1093/mnrasl/slac035 |doi-access=free |arxiv=2201.00823 }}</ref><ref name="AST-20220407">{{cite news |last=Buongiorno |first=Caitlyn |title=Astronomers discover the most distant galaxy yet - Unusually bright in ultraviolet light, HD1 may also set another cosmic record. |url=https://astronomy.com/news/2022/04/researchers-discover-the-most-distant-galaxy-yet |date=7 April 2022 |work=[[Astronomy (magazine)|Astronomy]] |accessdate=7 April 2022 }}</ref><ref name="INV-20220407">{{cite news |last=Wenz |first=John |title=Behold! Astronomers May Have Discovered The Most Distant Galaxy Ever – HD1 could be from just 300 million years after the Big Bang. |url=https://www.inverse.com/science/most-distant-galaxy-discovery |date=7 April 2022 |work=[[Inverse (website)|Inverse]] |accessdate=7 April 2022 }}</ref>