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Interstellar Object Enters Solar System

Comet 3I/ATLAS poses no threat to Earth and will remain far away, coming only about as close as the orbit of Mars. 3I/ATLAS should remain visible to ground-based telescopes through September 2025, pass behind the Sun, and then reappear on the other side of the Sun by early December 2025.

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This image shows the motion of comet 3I/ATLAS moving in front of background stars. These follow-up observations by the Canada-France-Hawaii Telescope shows the object has faint cometary activity.

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Hubble's Night Sky Challenge

Do you have a telescope? Would you like to see some of the same night sky objects from the ground that Hubble has seen from space? We invite you to commemorate the Hubble Space Telescope’s 35th anniversary by accepting our yearlong stargazing challenge!

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This sparkling picture taken by the NASA/ESA Hubble Space Telescope shows the center of globular cluster Messier 4. The power of Hubble has resolved the cluster into a multitude of glowing orbs, each a colossal nuclear furnace. It contains several tens of thousand stars and is noteworthy in being home to many white dwarfs — the cores of ancient, dying stars whose outer layers have drifted away into space. In July 2003, Hubble helped make the astounding discovery of a planet called PSR B1620-26 b, 2.5 times the mass of Jupiter, which is located in this cluster. Its age is estimated to be around 13 billion years — almost three times as old as the Solar System! It is also unusual in that it orbits a binary system of a white dwarf and a pulsar (a type of neutron star).

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NASA astronaut and Expedition 73 Flight Engineer Jonny Kim works inside the SpaceX Dragon cargo spacecraft completing cargo operations before it undocked from the International Space Station’s Harmony module several hours later.

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Explore our changing planet

For more than 50 years, NASA satellites have provided data on Earth’s land, water, air, temperature, and climate. NASA’s Earth Information Center allows visitors to see how our planet is changing in six key areas: sea level rise and coastal impacts, health and air quality, wildfires, greenhouse gases, sustainable energy, and agriculture.

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A type of phytoplankton called coccolithophores, less common in waters off New England since around 2010, made an impressive appearance in summer 2025.

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