Redigerer Eta Carinae (avsnitt)

=== 20. århundre og nyere tid ===
Fra 1900 holdt stjernen seg på rundt 7.6 magnitude, men begynte igjen å bli lysere i 1953.<ref name="thackeray">{{cite journal|bibcode=1953MNRAS.113..237T|title=Note on the brightening of Eta Carinae|journal=Monthly Notices of the Royal Astronomical Society|volume=113|issue=2|pages=237–238|last1=Thackeray|first1=A. D.|year=1953|doi=10.1093/mnras/113.2.237|doi-access=free}}</ref><ref name="damineli" /> Etter en markant lysøkning i 1998-99, ble den igjen synlig med det blotte øye. I 2014 var lysstyrken tilbake på 4.5 magnitude.<ref name="telegram">{{cite journal|bibcode=2014ATel.6368....1H|title=Eta Carinae – Caught in Transition to the Photometric Minimum|journal=The Astronomer's Telegram|volume=6368|pages=1|last1=Humphreys|first1=R. M.|last2=Martin|first2=J. C.|last3=Mehner|first3=A.|last4=Ishibashi|first4=K.|last5=Davidson|first5=K.|year=2014}}</ref> Observasjoner viser en 5.5-års syklus knyttet til dens binære stjernesystem, bekreftet ved spektroskopiske hendelser som sammenfaller med stjernenes nærmeste punkt (periastron) i banen.<ref name="mehnerir">{{cite journal|bibcode=2014A&A...564A..14M|doi=10.1051/0004-6361/201322729|arxiv=1401.4999|title=Near-infrared evidence for a sudden temperature increase in Eta Carinae|last1=Mehner|first1=Andrea|last2=Ishibashi|first2=Kazunori|last3=Whitelock|first3=Patricia|last4=Nagayama|first4=Takahiro|last5=Feast|first5=Michael|last6=Van Wyk|first6=Francois|last7=De Wit|first7=Willem-Jan|journal=Astronomy & Astrophysics|volume=564|year=2014|pages=A14|s2cid=119228664}}</ref><ref name="landes">{{cite journal|last1=Landes|first1=H.|last2=Fitzgerald|first2=M.|year=2010|title=Photometric observations of the η&nbsp;Carinae 2009.0 spectroscopic event|journal=Publications of the Astronomical Society of Australia|volume=27|issue=3|pages=374–377|doi=10.1071/AS09036|bibcode=2010PASA...27..374L|arxiv=0912.2557|s2cid=118568091}}</ref><ref name="2018-07-02_NAL">{{cite journal|last1=Hamaguchi|first1=Kenji|last2=Corcoran|first2=Michael F|last3=Pittard|first3=Julian M|last4=Sharma|first4=Neetika|last5=Takahashi|first5=Hiromitsu|last6=Russell|first6=Christopher M. P|last7=Grefenstette|first7=Brian W|last8=Wik|first8=Daniel R|last9=Gull|first9=Theodore R|last10=Richardson|first10=Noel D|last11=Madura|first11=Thomas I|year=2018|title=Non-thermal X-rays from colliding wind shock acceleration in the massive binary Eta Carinae|journal=Nature Astronomy|volume=2|issue=9|pages=731–736|bibcode=2018NatAs...2..731H|doi=10.1038/s41550-018-0505-1|arxiv=1904.09219|s2cid=126188024|first12=Anthony F. J|last12=Moffat}} [http://eprints.whiterose.ac.uk/133419/ Alt URL]</ref>