MiniNeptune found orbiting distant star

first_imgIn an as-yet-unconfirmed finding, submitted to The Astrophysical Journal Letters, the team also reports detecting an Earth-size planet that orbits HD21749 once every 7.8 days or so. Because that planet orbits its host star even closer than HD21749b does, it would likely have a surface temperature that’s much hotter. Sign up for our daily newsletter Get more great content like this delivered right to you! Country Email Click to view the privacy policy. Required fields are indicated by an asterisk (*) Country * Afghanistan Aland Islands Albania Algeria Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia, Plurinational State of Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo, the Democratic Republic of the Cook Islands Costa Rica Cote d’Ivoire Croatia Cuba Curaçao Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Holy See (Vatican City State) Honduras Hungary Iceland India Indonesia Iran, Islamic Republic of Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Korea, Democratic People’s Republic of Korea, Republic of Kuwait Kyrgyzstan Lao People’s Democratic Republic Latvia Lebanon Lesotho Liberia Libyan Arab Jamahiriya Liechtenstein Lithuania Luxembourg Macao Macedonia, the former Yugoslav Republic of Madagascar Malawi Malaysia Maldives Mali Malta Martinique Mauritania Mauritius Mayotte Mexico Moldova, Republic of Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island Norway Oman Pakistan Palestine Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Qatar Reunion Romania Russian Federation Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Sint Maarten (Dutch part) Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Swaziland Sweden Switzerland Syrian Arab Republic Taiwan Tajikistan Tanzania, United Republic of Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States Uruguay Uzbekistan Vanuatu Venezuela, Bolivarian Republic of Vietnam Virgin Islands, British Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe NASA Goddard Space Flight Center By Sid PerkinsJan. 7, 2019 , 5:15 PM A warm, gaseous planet about three times the diameter of Earth circles an orange dwarf star about 53 light-years away, astronomers reported today at the annual meeting of the American Astronomical Society in Seattle, Washington. The planet, dubbed HD21749b (depicted above in an artist’s representation), is one of three small exoplanets discovered by one of NASA’s newest satellites.HD21749b has an estimated density about that of water. That means it’s unlikely to be a rocky planet like Earth, though it may have some rocky parts. It’s also a lot hotter than our home planet, orbiting its sun—HD21749—at about half the distance from which Mercury orbits our star. Data suggest the planet has a relatively toasty cloud-top temperature of 149°C, somewhat cooler than Mercury because the host star HD21749 is somewhat smaller and cooler than our sun.The planet was first discovered by NASA’s Transiting Exoplanet Survey Satellite, which was launched in April 2018. That probe is designed to look for the minieclipses that occur when planets pass in front of their host stars as seen from Earth. Subsequent analyses of old data gathered by ground-based telescopes helped the scientists calculate the planet’s 36-day-long “year.” ‘Mini-Neptune’ found orbiting distant starlast_img

Leave a Reply

Your email address will not be published. Required fields are marked *